BGSF1717MN26E6327XTSA1 数据手册
Ante n na S wi t ch Mo d u le : B G S F1 717 M N2 6
Ante n na S wi t ch Mo d u le wi th i n tegr a ted
MI P I R F F E Int er fa ce, 2 G SM TX P or ts f or
multi -m od e GS M/ E D GE, W CD M A or L TE
Appli cat io ns a nd C ar r ier A g gr e gat io n
Application
AN384
Solut iNote
ons
About this document
Scope and purpose
This application note describes Infineon’s Antenna Switch Module BGSF1717MN26 as main antenna switch
module for multi-mode GSM/EDGE, WCDMA or LTE Applications and Carrier Aggregation applications.
1. This application notes gives an overview about main purpose of this
SP7T Low Band + SP7T High Band Antenna Switch Module.
2. Multi-mode GSM/EDGE, WCDMA or LTE Applications and Carrier Aggregation are the primary
application of this document.
3. The Printed Circuit Board (PCB) design as well as antenna matching network proposed in this note
provides a customer oriented approach where a single ASM enables multi-mode GSM/EDGE, WCDMA
or LTE and Carrier Aggregation applications
4. Key performance parameters include higher Isolation between input channels (~32dB), integrated
SAW Filter for LB and HB GSM Tx inputs, very low IL of the TX channels (0.5dB), integration of SP7T
LB and SP7T HB in one module and an integrated MIPI RFFE Interface.
1
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Table of Content
Table of Content
About this document ................................................................................................................... 1
1
1.1
1.2
1.3
1.4
Introduction of BGSF1717MN26 .................................................................................... 5
Main Features ...................................................................................................................................... 5
Functional Diagram............................................................................................................................. 6
Pin Configuration ................................................................................................................................ 7
Pin Description .................................................................................................................................... 7
2
Application ................................................................................................................. 9
3
3.1
3.2
3.2.1
3.2.2
Application Circuit of BGSF1717MN26 ......................................................................... 10
Application Board ............................................................................................................................. 10
Deembedding .................................................................................................................................... 11
Deembedding concept with a “prepared” SMA connector and a “Half-Thru” boardPort
Extension ..................................................................................................................................... 11
Deembedding control process ................................................................................................... 12
4
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.2.6
Small Signal Characteristics of BGSF1717MN26 ............................................................ 13
Small Signal Parameters LB switch .................................................................................................. 13
Insertion Loss from LB Antenna to the respective RF TRX Port ................................................ 13
Insertion Loss TX LB port ............................................................................................................ 14
Insertion Loss high linearity ultra low IL TRx10 port ................................................................. 14
Return Loss from LB Antenna to the respective RF Port ........................................................... 15
Return Loss of LB TRX RF ports to LB Antenna .......................................................................... 16
Return Loss TX LB RF port........................................................................................................... 16
Antenna to port and Port to Port Isolation LB path .................................................................. 18
Antenna to port and Port to Port Isolation HB path .................................................................. 25
5
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.2
5.2.1
5.2.2
5.2.3
Non-Linear performance of BGSF1717MN26 ................................................................. 28
Intermodulation ................................................................................................................................ 28
Intermodulation Measurement Setup ......................................................................................... 29
Intermodulation Measurement conditions for Band I ............................................................... 30
Intermodulation Measurement Results for Band I .................................................................... 30
Intermodulation Measurement conditions for Band V .............................................................. 31
Intermodulation Measurement Results for Band V ................................................................... 31
Harmonic Distortion........................................................................................................................... 32
Harmonic Generation Measurement conditions ......................................................................... 32
Harmonic Generation Measurement Results of Low Band inputs .............................................. 33
Harmonic Generation Measurement Results of High Band inputs ............................................. 35
6
Switching time.......................................................................................................... 36
7
7.1
7.2
Appendix: Switch Controller Unit ................................................................................ 37
Operating Guide ................................................................................................................................. 37
Display Settings of the Controller Unit .............................................................................................. 38
8
Authors .................................................................................................................... 39
Revision History ......................................................................................................................... 40
Application Note AN384
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Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
List of Figures and Tables
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Figure 35
BGSF1717MN26 in TSNP-26-3 ............................................................................................................. 5
BGSF1717MN26 Functional Diagram ................................................................................................. 6
BGSF1717MN26 Pin Configuration .................................................................................................... 7
BGSF1717MN26 in mobile phone cellular frontend (typical discrete LTE-A feature set) ................. 9
Layout of the application board ....................................................................................................... 10
PCB Layer stack-up ........................................................................................................................... 10
“Half-Thru” deembedding board ..................................................................................................... 12
“Full-Thru” deembedding board ...................................................................................................... 12
Application circuit BGSF1717MN26 .................................................................................................. 13
Forward transmission from LB Antenna to TX LB port .................................................................... 13
Forward transmission from LB Antenna to TX LB port .................................................................... 14
Forward transmission from LB Antenna to TRX10 port ................................................................... 15
Return Loss from LB Antenna to the respective TRX LB RF port ..................................................... 15
Return Loss of LB TRX RF ports to LB Antenna ................................................................................ 16
Return Loss port TX LB RF port ......................................................................................................... 17
Return Loss of high linearity ultra low IL TRX10 RF port ................................................................. 17
Worst case Antenna to Port Isolation Low Band part ...................................................................... 20
Worst case Port to Port Isolation Low Band part1 ........................................................................... 20
Forward transmission from HB Antenna to the respective TRX HB RF port ................................... 21
Forward transmission from HB Antenna to the respective TX HB RF port ..................................... 22
Return Loss from HB Antenna to the respective TRX HB RF port .................................................... 23
Return Loss from HB TRX RF ports to HB Antenna.......................................................................... 24
Return Loss of HB TX RF port ............................................................................................................ 24
Worst case Antenna to Port Isolation High Band part ..................................................................... 27
Worst case Port to Port Isolation High Band part1 ........................................................................... 27
Block diagram of RF Switch intermodulation .................................................................................. 29
Intermodulation Measurement Test Setup ...................................................................................... 29
Intermodulation measurement results for Band I ........................................................................... 30
Intermodulation measurement results for Band V .......................................................................... 31
Harmonic Generation Measurement setup ...................................................................................... 32
Measurements of Harmonic power over Carrier power of Low-Band inputs to LB Antenna ......... 33
Harmonic power measurements of high linear LB input TRX10 over the Band 17 carrier............. 34
Measurements of Harmonic power over Carrier power of High-Band inputs to HB Antenna ....... 35
Switching time measurements of the TX_LB input to the LB Antenna ........................................... 36
Switch Controller Unit Board ............................................................................................................ 37
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
List of Figures and Tables
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Pin Description (top view) ................................................................................................................... 7
Insertion Loss from LB Antenna to TX LB port ................................................................................. 13
Insertion loss from LB Antenna to TX LB port .................................................................................. 14
Insertion loss from LB Antenna to TRx10 port ................................................................................. 14
Return loss from LB Antenna to the respective TRX LB RF port ...................................................... 15
Return loss from respective TRX LB RF port to LB Antenna ............................................................ 16
Return loss from TR LB RF port ......................................................................................................... 16
Return loss from TRX10 RF port ........................................................................................................ 17
Worst case Antenna to Port Isolation High Band part ..................................................................... 18
Worst case Port to Port Isolation Low Band part ............................................................................. 19
Insertion Loss from HB Antenna to the respective TRX HB RF port ................................................ 21
Insertion Loss from HB Antenna to the respective TX HB RF .......................................................... 22
Return Loss from HB Antenna to the respective TRX HB RF port ................................................... 23
Return Loss from HB TRX RF ports to HB Antenna .......................................................................... 23
Return Loss of HB TX RF port ............................................................................................................ 24
Worst case Antenna to Port Isolation High Band part ..................................................................... 25
Worst case Port to Port Isolation High Band part ............................................................................ 26
Test conditions and specifications of IMD measurements .............................................................. 30
Typical and maximal value of intermodulation products in dBm for Band I................................. 30
Test conditions and specifications of IMD measurements .............................................................. 31
Typical and maximal value of intermodulation products in dBm for Band V................................ 31
Harmonic Generation measurement Conditions ............................................................................ 32
Switching time values ....................................................................................................................... 36
Seeting Display of Active RF Path, Power UP, Power Down and Isolation State ............................ 38
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Introduction of BGSF1717MN26
1
Introduction of BGSF1717MN26
For RF Front-End solutions that integrate new features such as downlink inter-band carrier aggregation to
increase Downlink data rates, Antenna Switch Modules (ASMs) are facing new challenges. Two RF signals
being transmitted in different frequency bands have to be routed from two different antennas – one
dedicated for low frequency band and one for high frequency band - to the RF Transceiver at the same time.
For this kind of application, the new switch which combines two SP7T ICs and the MIPI control interface, the
so-called DP14T, have been introduced to the market.
The BGSF1717MN26 is a double Pole Fourteen Throw (DP14T / SP7T+SP7T) ASM optimized for wireless
applications up to 2.7 GHz. It is a perfect solution for multi-mode handsets based on quad-band GSM,
WCDMA, LTE and ideal for carrier aggregation solutions. TRX10 is designed to achieve ultra-high linearity.
The ASM configuration is shown in the Figure 2.
The module comes in a miniature TSNP package shown in the Figure 1 and comprises of two high power
SP7T switches with integrated MIPI RFFE interface and harmonic filters for GSM high and low band
transmitter signal paths. The on-chip MIPI RFFE interface supports both 1.2 V and 1.8 V supply voltages.
No external DC blocking capacitors are required in typical applications as long as no DC is applied to any RF
port. The pin assignment can be found in the Figure 3.
1.1
Main Features
• Suitable for multi-mode GSM / EDGE / C2K /
WCDMA / LTE applications and carrier
aggregation
• 2 high-linearity GSM TX paths
• High port-to-port isolation
• Integrated MIPI RFFE interface
Operating from 0.1 to 2.7 GHz coverage
• No decoupling DC capacitors required, if no DC
applied on RF lines
• Ultra-low insertion loss and harmonics
generation
• Small form factor: 3.2 mm x 2.8 mm x 0.73 mm
• Integrated GSM transmit filters
• 12 interchangeable, high-linearity WCDMA TRX
ports
• Port TRX10 designed for ultra-high linearity
Figure 1
BGSF1717MN26 package in TSNP-26-3
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Introduction of BGSF1717MN26
1.2
Functional Diagram
Figure 2
BGSF1717MN26 Functional Diagram
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Introduction of BGSF1717MN26
1.3
Pin Configuration
GND
TXLB
GND
TXHB
GND
13
12
11
10
9
8
TRX1
15
7
TRX2
TRX9
16
6
TRX3
TRX10
17
5
TRX4
TRX11
18
4
TRX5
TRX12
19
3
TRX6
ANT LB
20
2
ANT HB
GND
21
1
GND
TRX7
14
TRX8
2.8 x 3.2 x 0.73 mm
GND pad
22
23
VDD
VIO
Figure 3
BGSF1717MN26 Pin Configuration
1.4
Pin Description
Table 1
Pin Description (top view)
24
SDATA
25
SCLK
26
GND
Pin NO
Name
Pin Type
0
GND
GND
Ground, die pad
1
GND
GND
DC ground
2
ANT HB
I/O
High band antenna port
3
TRX6
I/O
WCDMA TRX port
4
TRX5
I/O
WCDMA TRX port
5
TRX4
I/O
WCDMA TRX port
6
TRX3
I/O
WCDMA TRX port
7
TRX2
I/O
WCDMA TRX port
8
TRX1
I/O
WCDMA TRX port
9
GND
GND
RF ground
10
TXHB
I
GSM HB port
11
GND
GND
RF ground
12
TXLB
I
GSM LB port
13
GND
GND
RF ground
Application Note AN384
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Function
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Introduction of BGSF1717MN26
Table 1
Pin Description (top view)
Pin NO
Name
Pin Type
14
TRX7
I/O
WCDMA TRX port
15
TRX8
I/O
WCDMA TRX port
16
TRX9
I/O
WCDMA TRX port
17
TRX10
I/O
WCDMA TRX port
18
TRX11
I/O
WCDMA TRX port
19
TRX12
I/O
WCDMA TRX port
20
ANT LB
I/O
Low band antenna port
21
GND
GND
DC ground
22
VDD
PWR
Supply Voltage
23
VIO
PWR
RFFE supply voltage
24
SDATA
I/O
Data
25
SCLK
I
Clock
26
GND
GND
DC ground
Application Note AN384
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Function
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Application
2
Application
A typical application of BGSF1717MN26 ASM in a mobile phone is shown in the Figure 4. At the main
antenna path of the RF Front-End the BGSF1717MN26 switches signals from the high band and low band
antenna to the different transceiver IC input and outputs. For the diversity path different Infineon RF
switches can be used e.g. BGS16MN14, BGS18MN14. Infineon offers also besides ASMs, general purpose RF
Switches and a broad portfolio of Low Noise Amplifiers and Antenna Tuner Devices. All of Infineon Products
concerning mobile phone applications can be found in our newest Application Guide for RF & Protection
Devices/ Mobile Communication.
Antenna Aperture
Switches (SPxT)
HB
LB
Antenna Switch Module
BGSF1717MN26
GNSS
LNA
ASM
Powered by
LTE
LNA
Diversity Switches
(SPxT)
LTE
LNA
Tx/Rx SPDT
Tx/Rx SPDT
Tranceiver 1
Figure 4
Tx/Rx DPDT
Transciever 2
BGSF1717MN26 in mobile phone cellular frontend (typical discrete LTE-A feature set)
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Application Circuit of BGSF1717MN26
3
Application Circuit of BGSF1717MN26
In this chapter the evaluation board with application circuit including matching passive elements is
presented. Afterwards, the deembedding process required for S-Parameter measurements is described.
3.1
Device:
BGSF1717MN26
Application:
Antenna Switch Module
PCB Marking:
BGSF1717MN26 v1.1
EVB Order No.:
BGSF1717MN26 BOARD
SP001136296
Application Board
The EValuation Board (EVB) used for the RF measurements is shown in the Figure 5. The EVB is designed so
that every 50 Ohm signal lines have the same length. The layer stack-up of the PCB is presented in Figure 6.
Figure 5
Layout of the application board
Vias
Rodgers, 0.2mm
Copper
35µm
Figure 6
FR4, 0.7mm
PCB cross section with layer stack-up
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Application Circuit of BGSF1717MN26
3.2
Deembedding
The device (BGSF1717MN26) is deembedded from influence of the application circuit and coaxial
connectors by at first measuring a coaxial connector and a “half-board” micro strip line and then by loading
this data in the fixture simulator of the network analyzer. In the Figure 7 this deembedding concept is given.
The deembedding of this RF device is performed in several steps explained in the next subchapters.
Figure 7
Deembedding concept with a “prepared” SMA connector and a “Half-Thru” board
3.2.1
Port Extension
In order to shift the reference plane of the network analyzer to the PCB signal line connect a SMA connector
with a cut pin of the inner conductor to one port of the Vector Network Analyzer (VNA) and measure port
extensions at this port.
Figure 8 shows such a “prepared” SMA connector with an outer pin cut with a wire cutter.
Outer
conductor
pin is cut
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Application Circuit of BGSF1717MN26
Figure 8
SMA connector with cut inner pin
After the measurement of the S21 of the half-thru board (given in Figure 9) with port extension turned on is completed,
the s2p-data ought to be loaded in the fixture simulator. This measurement result includes the insertion loss and the
phase shift of the one SMA connector and the transmission line to the chip. After all the port extension has to be
deactivated.
Figure 9
“Half-Thru” deembedding board
3.2.2
Deembedding control process
Measure this full-thru PCB (given in the Figure 10) to verify your deembedding having the fixture simulator turned on
for each port of the VNA, whereas port extension must be off. If the insertion loss is close to 0 dB and S11 reflection has
a considerable value, further RF measurements can be done.
Figure 10
“Full-Thru” deembedding board
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4
Small Signal Characteristics of BGSF1717MN26
The S-Parameters are measured at 25 °C with a VNA in an application circuit shown in Figure 11.
2.4 nH
2.7 pF
Low Band
Antenna
High Band
Antenna
1.5 pF
68 nH
5.1 nH
Unused ports are
terminated with 50Ω
Figure 11
Application circuit BGSF1717MN26
4.1
Small Signal Parameters LB switch
4.1.1
Insertion Loss from LB Antenna to the respective RF TRX Port
Table 2
Insertion Loss from LB Antenna to TX LB port
Frequency
(MHz)
TRx7
TRx8
TRx9
TRx11
TRx12
704
716
740
751
824
881
915
942
-0.76
-0.74
-0.72
-0.67
-0.65
-0.76
-0.74
-0.71
-0.66
-0.65
-0.74
-0.72
-0.69
-0.64
-0.63
-0.74
-0.73
-0.7
-0.65
-0.64
-0.75
-0.73
-0.7
-0.66
-0.64
-0.75
-0.74
-0.71
-0.66
-0.64
-0.75
-0.74
-0.71
-0.66
-0.64
-0.76
-0.74
-0.71
-0.66
-0.64
Insertion Loss TRx LB paths
0
-10
0.96 GHz
-0.6515 dB
0.6 GHz
-0.6967 dB
-20
2.1 GHz
-28.21 dB
-30
TR7
TRx9
TRx8
TRx11
TRx12
-40
-50
0.0003
Figure 12
2
4
6
Frequency (GHz)
8
10
Forward transmission from LB Antenna to TX LB port
Application Note AN384
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Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.1.2
Insertion Loss TX LB port
Table 3
Insertion loss from LB Antenna to TX LB port
Frequency
(MHz)
704
716
740
751
824
881
915
942
TR LB
-1.37
-1.39
-1.42
-1.45
-1.51
-1.52
-1.51
-1.51
Insertion Loss Tx LB
0
0.915 GHz
-1.51 dB
Insertion Loss (dB)
-10
1.71 GHz
-41 dB
-20
2.17 GHz
-40.76 dB
-30
-40
0.824 GHz
-1.508 dB
-50
-60
0.0003
2
4
6
Frequency (GHz)
8
Figure 13
Forward transmission from LB Antenna to TX LB port
4.1.3
Insertion Loss high linearity ultra-low IL TRx10 port
Table 4
10
Insertion loss from LB Antenna to TRx10 port
Frequency
(MHz)
704
716
740
751
824
881
915
942
TR LB
-0.56
-0.56
-0.54
-0.55
-0.55
-0.56
-0.55
-0.56
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Insertion Loss TRx10 port
0
0.704 GHz
-0.5647 dB
Insertion Loss (dB)
-10
0.716 GHz
-0.5592 dB
-20
-30
2.11 GHz
-26.18 dB
-40
0.0003
2
4
6
Frequency (GHz)
8
10
Figure 14
Forward transmission from LB Antenna to TRX10 port
4.1.4
Return Loss from LB Antenna to the respective RF Port
Table 5
Frequency
(MHz)
TRx7
TRx8
TRx9
TRx10
TRx11
TRx12
Return loss from LB Antenna to the respective TRX LB RF port
704
716
740
751
824
881
915
942
-13.4
-14
-14.2
-14.5
-15.4
-15.5
-13.5
-14.1
-14.4
-14.6
-15.5
-15.6
-13.7
-14.3
-14.6
-14.9
-15.7
-15.8
-13.7
-14.4
-14.6
-15
-15.8
-15.9
-13.8
-14.5
-14.8
-15.2
-16.1
-16.2
-13.8
-14.5
-14.9
-15.4
-16.1
-16.2
-13.7
-14.4
-14.9
-15.4
-16.1
-16.2
-13.6
-14.4
-14.9
-15.4
-16.1
-16.2
ANT Return Loss all LB ports
10
Return Loss (dB)
0
-10
-20
TRx7
TRx9
TRx11
TRx8
TRx10
Trx12
-30
-40
0.0003
Figure 15
2
4
6
Frequency (GHz)
8
10
Return Loss from LB Antenna to the respective TRX LB RF port
Application Note AN384
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Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.1.5
Table 6
Return Loss of LB TRX RF ports to LB Antenna
Return loss from respective TRX LB RF port to LB Antenna
Frequency
(MHz)
TRx7
TRx8
TRx9
TRx10
TRx11
TRx12
704
716
740
751
824
881
915
942
-13.7
-14.3
-14.8
-14.8
-15.8
-16.2
-13.8
-14.5
-14.9
-15
-15.9
-16.4
-13.9
-14.6
-15.1
-15.1
-16.1
-16.6
-14
-14.6
-15.2
-15.2
-16.2
-16.8
-14.3
-15
-15.7
-15.8
-16.9
-17.5
-14.4
-15.2
-16
-16
-17.2
-17.9
-14.3
-15.1
-15.9
-15.9
-17.1
-17.9
-14.4
-15.3
-16.1
-16.1
-17.3
-18.1
Port Return Loss all LB ports
0
Return Loss (dB)
-5
-10
TRx7
TRx9
TRx11
TRx8
TRx10
TRx12
-15
-20
0.0003
2
4
6
Frequency (GHz)
Figure 16
Return Loss of LB TRX RF ports to LB Antenna
4.1.6
Return Loss TX LB RF port
Table 7
Return loss from TR LB RF port
Frequency
(MHz)
ANT LB port
TX LB port
8
10
704
716
740
751
824
881
915
942
-11.9
-10.1
-11.8
-10.1
-11.8
-10.1
-11.8
-10.1
-12.1
-10.1
-13
-10.7
-13.9
-11.4
-14.9
-12.3
Application Note AN384
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Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Return Loss TX LB
10
0.89027 GHz
-10.7 dB
Return Loss (dB)
0
0.942 GHz
-12.26 dB
-10
-20
Antenna LB
-30
TX LB
-40
0.0003
Figure 17
Table 8
2
4
6
Frequency (GHz)
8
10
Return Loss port TX LB RF port
Return loss from TRX10 RF port
Frequency
(MHz)
ANT LB port
TRX10 port
704
716
740
751
824
881
915
942
-14.5
-14.8
-14.6
-15
-14.9
-15.1
-15
-15.2
-15.2
-15.8
-15.4
-16
-15.4
-15.9
-15.4
-16.1
Return Loss TRX10
5
Return Loss (dB)
0
-5
-10
Antenna LB
-15
TRX10
-20
0.0003
Figure 18
2
4
6
Frequency (GHz)
8
10
Return Loss of high linearity ultra-low IL TRX10 RF port
Application Note AN384
17
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.1.7
Antenna to port and Port to Port Isolation LB path
Apply to the Table 9 and Table 10 on the next page.
Table 9
Frequency
(GHz)
0.704
0.716
0.74
0.751
0.824
0.881
0.915
0.942
1.71
1.842
1.96
1.97
2.017
2.14
2.17
2.35
2.593
2.69
3.5
1
Worst case Antenna to Port Isolation High Band part1
TX HB active
ANTHB
ANTHB
TRX1
TX LB
TRX1 active
ANTHB
ANTHB
TRX2
TX HB
TRX2 active
ANTHB
ANTHB
TRX3
TRX1
TRX3 active
ANTHB
ANTHB
TRX4
TRX2
TRX4 active
ANTHB
ANTHB
TRX5
TRX3
TRX5 active
ANTHB
ANTHB
TRX6
TRX4
-39.5
-39.3
-38.9
-38.6
-37.4
-36.3
-35.8
-35.4
-45.4
-46.5
-50
-50.2
-52.8
-54.6
-49.8
-34.7
-40.9
-42.4
-56.4
-47.2
-46.9
-47
-46.4
-45.2
-44.1
-43.6
-43.5
-45
-48
-53.3
-54.5
-60.7
-61.9
-63.9
-53.2
-49.3
-47.9
-44.2
-37.3
-37.1
-36.6
-36.7
-35.9
-35.2
-35.1
-34.8
-33.1
-34.3
-39.6
-40.2
-44.9
-48.6
-46
-37.6
-32.9
-31.5
-27.6
-34.1
-34
-33.8
-33.7
-32.9
-32.5
-32.2
-32
-29.5
-31
-36.3
-37
-41.4
-46.2
-43.1
-34.6
-29.9
-28.7
-25.2
-33.4
-33.3
-33
-32.9
-32.3
-31.8
-31.5
-31.3
-28.6
-30.2
-35.3
-36
-40.5
-45.3
-41.9
-33.7
-29.3
-28.1
-24.9
-42.7
-42.3
-42.3
-42
-41.3
-40.5
-40.2
-39.8
-35.7
-37.1
-42.9
-43.8
-48.9
-51.4
-49.1
-42.2
-38
-36.5
-29.7
-39.7
-39.6
-39.8
-39.6
-39.3
-39.4
-39.9
-40.2
-30.2
-32.7
-36.8
-37.2
-40.4
-41.1
-36
-19.9
-24.8
-26
-28.9
-34.2
-33.9
-33.8
-33.7
-32.9
-32.5
-32.2
-31.9
-29.9
-31.3
-36.5
-37.3
-41.8
-46.5
-43.7
-35.1
-30.7
-29.5
-26.2
-35.5
-35.4
-35.2
-35.1
-34.3
-33.9
-33.5
-33.2
-30.6
-32
-37.3
-38
-42.2
-47
-44.1
-36
-31.3
-29.9
-26.2
-35
-34.8
-34.6
-34.4
-33.8
-33.4
-33.1
-32.8
-30
-31.5
-36.8
-37.5
-41.8
-47.1
-43.2
-35.1
-30.5
-29.2
-25.5
-38.3
-38.4
-38
-37.9
-37.1
-36.6
-36.3
-36
-32.4
-34
-39.3
-39.9
-44.2
-48.9
-45.8
-37.5
-33.1
-31.6
-27
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher) Isolation
Application Note AN384
18
Revision 1.0, 2015-10-03
-43.2
-42.9
-42.6
-42.1
-40.5
-39.2
-38.6
-38.2
-29.8
-30.9
-36.7
-37.4
-42.4
-44.1
-41.5
-34.5
-30.1
-28.9
-22.9
TRX6 active
ANTHB
ANTHB
ANT LB
TRX5
-39.3
-39.1
-39
-38.7
-37.9
-37.3
-36.9
-36.8
-32.7
-34.3
-40
-40.5
-45.4
-49.7
-46.6
-39.2
-34.5
-33.1
-25.6
-37
-36.8
-36.5
-36.2
-35.3
-34.5
-34.1
-33.8
-29.1
-31.1
-37.5
-38.4
-42.9
-48.2
-45.6
-38.8
-36.3
-35.6
-30.4
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Table 10
Frequency
(GHz)
0.704
0.716
0.74
0.751
0.824
0.881
0.915
0.942
1.71
1.842
1.96
1.97
2.017
2.14
2.17
2.35
2.593
2.69
3.5
1
Worst case Port to Port Isolation Low Band part1
TX LB active
TRX7 active
TRX8 active
ANTLB ANTLB ANTLB ANTLB ANTLB ANTLB
TX HB
TRX7
TX LB
TRX8
TRX7
TRX9
-39.6
-39.6
-39
-39
-37.8
-36.7
-36
-35.6
-35
-35.2
-35.2
-35
-35.2
-35.1
-35.4
-34.3
-33.2
-32.8
-30.9
-39.8
-39.9
-39.8
-39.9
-39.7
-39.8
-39.6
-39.5
-37.8
-37.7
-37.4
-37.3
-37.3
-36.2
-35.8
-35.9
-39.2
-38.2
-38.5
-40.9
-41.1
-40.5
-40.5
-40.4
-40.7
-40.8
-41.2
-46.1
-48.1
-43.4
-43.5
-42.2
-40.3
-40.2
-39.2
-38.8
-38.9
-45.8
-32.3
-32.2
-31.9
-31.7
-31.1
-30.5
-30.2
-30.1
-28
-25.3
-21.9
-21.7
-21
-19.8
-19.7
-19
-18.5
-18.7
-26.4
-34.9
-34.7
-34.4
-34.4
-33.7
-33.1
-32.7
-32.6
-28.8
-26.3
-23.5
-23.4
-22.8
-22
-21.9
-21.5
-21.6
-21.9
-25.5
-33.5
-33.3
-33
-32.9
-32.1
-31.6
-31.3
-31.1
-27.4
-24.7
-21.8
-21.6
-20.9
-20
-19.9
-19.4
-19.2
-19.3
-25.7
TRX9 active
ANTLB ANTLB
TRX8
TRX10
-32.1
-31.9
-31.7
-31.7
-30.9
-30.3
-30
-29.8
-27.3
-24.9
-21.6
-21.4
-20.5
-19.3
-19.1
-18.2
-17.6
-17.7
-25.8
-30.5
-30.4
-30.1
-30
-29.3
-28.7
-28.4
-28.2
-24.9
-22.9
-20.2
-20.1
-19.3
-18.2
-18
-17.1
-16.5
-16.6
-22.2
TRX10 active
ANTLB ANTLB
TRX9
TRX11
-31.4
-31.3
-31
-30.9
-30.2
-29.6
-29.3
-29.1
-26.7
-24.5
-21
-20.8
-19.9
-18.4
-18.2
-17.3
-16.5
-16.5
-24.6
-35.8
-35.7
-35.3
-35.3
-34.6
-33.9
-33.6
-33.4
-29.7
-26.8
-23.9
-23.7
-23.1
-22.1
-22
-21.4
-21
-21
-27.2
TRX11 active
ANTLB ANTLB
TRX10
TRX12
-35.2
-35
-34.8
-34.7
-33.9
-33.4
-33.1
-32.8
-28
-25.8
-23.9
-23.9
-23.5
-23.1
-23.1
-22.7
-22.4
-22.3
-24.9
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher) Isolation
Application Note AN384
19
Revision 1.0, 2015-10-03
-39.7
-39.8
-39.2
-39.1
-38
-37.2
-36.7
-36.2
-27.2
-23.7
-21.9
-21.9
-21.8
-21.9
-22
-22.4
-22.9
-23.4
-22.5
TRX12 active
ANTLB ANTLB
TRX11 ANTHB
-36.2
-36.2
-35.9
-35.8
-34.9
-34.2
-33.9
-33.7
-29.5
-26.6
-24
-23.9
-23.4
-22.6
-22.5
-21.9
-21.1
-20.8
-26.3
-37.8
-37.6
-37.3
-37.1
-36.2
-35.6
-35.3
-34.9
-26.8
-24.7
-24.6
-24.7
-25.1
-26.8
-27.3
-29.7
-32.5
-33.9
-30.8
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Isolation ANT to LB paths
0
Isolation (dB)
-20
-40
-60
-80
TXHB to ANTLB
LB active
TRx7 to ANTLB
TRx8 active
TRx9 to ANT LB
TRx10 active
TRx11 to ANTLB
TRx12 active
TRx7 to ANTLB
LB active
TRX9 to ANTLB
TRX8 active
TRx9 to ANTLB
TRx10 active
ANTHB to ANTLB
TRx12 active
TXLB to ANT LB
TRx7 active
TRx8 to ANTLB
TRx9 active
TRx10 to ANTLB
TRx11 active
TRx8 to ANTLB
TRX7 active
TRx10 to ANTLB
TRx9 active
TRx12 to ANTLB
TRx11 active
-100
0.0003
Figure 19
2
4
6
Frequency (GHz)
Worst case Antenna to Port Isolation Low Band part1
8
10
Isolation LB paths to LB paths
0
Isolation (dB)
-20
-40
-60
-80
TXHB to TXLB
LB active
TRx8 to TRx7
TRX7 active
TRx8 to TRx9
TRx9 active
TRx9 to TRx10
TRx10 active
TRx11 to TRx12
TRx12 active
TRx7 to TXLB
LB active
TRx7 to TRx8
TRx8 active
TRx10 to TRx9
TRx9 active
TRx10 to TRx11
TRx11 active
ANTHB to TRx12
TRx12 active
TXLB to TRx7
TRx7 active
TRX9 to TRx8
TRX8 active
TRx9 to TRx10
TRx10 active
TRx12 to TRx11
TRx11 active
-100
0.0003
Figure 20
2
4
6
Frequency (GHz)
8
10
Worst case Port to Port Isolation Low Band part1
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher)
Isolation
1
Application Note AN384
20
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.2
Small Signal Parameters HB switch
4.2.1
Insertion Loss from HB Antenna to the respective TRX HB RF Port
Table 11
Frequency
(MHz)
TRx1
TRx2
TRx3
TRx4
TRx5
TRx6
Insertion Loss from HB Antenna to the respective TRX HB RF port
1710
1842
1960
1970
2017
2140
2170
2350
2593
2690
3500
-0.6
-0.63
-0.64
-0.66
-0.64
-0.71
-0.66
-0.71
-0.73
-0.78
-0.75
-0.84
-0.72
-0.78
-0.81
-0.92
-0.85
-0.96
-0.72
-0.79
-0.83
-0.93
-0.86
-0.96
-0.76
-0.82
-0.87
-0.99
-0.9
-1
-0.82
-0.9
-0.97
-1.2
-1
-1.1
-0.86
-0.93
-1
-1.2
-1
-1.2
-0.99
-1.1
-1.2
-1.5
-1.2
-1.4
-0.92
-0.99
-1.1
-1.4
-1.2
-1.4
-0.89
-0.96
-1.1
-1.4
-1.1
-1.3
-0.98
-0.95
-1
-1.1
-0.95
-1.1
Insertion Loss TRx HB paths
0
1.428 GHz 1.99 GHz
3.5 GHz
-0.6416 dB -0.8803 dB -0.9546 dB
Insertion Loss (dB)
-5
1.805 GHz
-0.7132 dB
3.6 GHz
-0.9769 dB
3.8 GHz
-1.081 dB
-10
-15
-20
0.0003
Figure 21
2.69 GHz
-1.123 dB
DB(|S(3,1)|)
TRX1
DB(|S(3,1)|)
TRX3
DB(|S(3,1)|)
TRX5
DB(|S(3,1)|)
TRX2
DB(|S(3,1)|)
TRX4
DB(|S(3,1)|)
TRX6
4
6
8
Frequency (GHz)
Forward transmission from HB Antenna to the respective TRX HB RF port
Application Note AN384
2
21
10
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.2.2
Insertion Loss TX HB port
Table 12
Insertion Loss from HB Antenna to the respective TX HB RF
Frequency
(MHz)
1710
1842
1960
1970
2017
2140
2170
2350
2593
2690
3500
TRx1
-1.7
-1.5
-1.4
-1.4
-1.5
-
-
-
-
-
-
Insertion Loss Tx HB port
0
Insertion Loss (dB)
-10
1.71 GHz
-1.663 dB
-20
5.5115 GHz
-46.93 dB
1.91 GHz
-1.442 dB
3.5008 GHz
-41.6 dB
-30
-40
-50
-60
0.0003
Figure 22
2
4
6
Frequency (GHz)
8
10
Forward transmission from HB Antenna to the respective TX HB RF port
Application Note AN384
22
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.2.3
Return Loss from HB Antenna to the respective TRX HB RF Port
Table 13
Frequency
(MHz)
TRx1
TRx2
TRx3
TRx4
TRx5
TRx6
Return Loss from HB Antenna to the respective TRX HB RF port
1710
1842
1960
1970
2017
2140
2170
2350
2593
2690
3500
-27.8
-24.3
-23.4
-21.4
-19.5
-17.5
-20
-18.1
-17.2
-15.7
-15.3
-14
-16.6
-15.3
-14.3
-12.6
-13.1
-12
-16.5
-15.2
-14.2
-12.5
-13
-11.9
-15.6
-14.5
-13.4
-11.6
-12.4
-11.3
-14.2
-13.2
-12
-10
-11.1
-10.2
-14
-13
-11.7
-10
-10.9
-10
-13.5
-12.7
-11.1
-10
-10.2
-10
-15
-14.1
-12
-10
-10.5
-10
-16.6
-15.6
-13.1
-10
-11
-10
-15.6
-20.3
-23.4
-19.4
-19.5
-14.9
ANT Return Loss all HB ports
0
Return Loss (dB)
-10
-20
TRx1
TRx4
-40
TRx2
TRx5
-50
TRx3
Trx6
-30
-60
0.0003
2
4
6
Frequency (GHz)
8
Figure 23
Return Loss from HB Antenna to the respective TRX HB RF port
4.2.4
Return Loss of HB TRX RF Ports
Table 14
Frequency
(MHz)
TRx1
TRx2
TRx3
TRx4
TRx5
TRx6
10
Return Loss from HB TRX RF ports to HB Antenna
1710
1842
1960
1970
2017
2140
2170
2350
2593
2690
3500
-40.6
-25.8
-27.5
-24.6
-20.5
-18.2
-22.7
-19.4
-19.1
-17
-16.4
-14.7
-18.3
-16.4
-15.6
-13.4
-14
-12.6
-18.1
-16.2
-15.4
-13.1
-13.9
-12.5
-17.1
-15.4
-14.5
-12.2
-13.3
-11.9
-15.5
-14.2
-13
-10.4
-12.1
-10.8
-15.2
-13.9
-12.6
-10
-11.8
-10.5
-14.4
-13.3
-11.7
-10
-11
-10
-17.4
-15.6
-13.1
-10
-11.8
-10.2
-20.2
-17.5
-14.4
-10
-12.5
-10.7
-14.5
-18.2
-17.7
-13.1
-24.4
-18.1
Application Note AN384
23
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Port Return Loss all HB ports
0
Return Loss (dB)
-10
-20
-30
-40
-50
-60
0.0003
2
4
6
Frequency (GHz)
Figure 24
Return Loss from HB TRX RF ports to HB Antenna
4.2.5
Return Loss of HB TX RF Port
Table 15
Frequency
(MHz)
ANTHB
TX HB
TRx1
TRx4
TRx2
TRx5
TRx3
TRX6
8
10
Return Loss of HB TX RF port
1710
1842
1960
1970
2017
2140
2170
2350
2593
2690
3500
-20.1
-24.5
-23.7
-16.1
-17
-14.5
-16.6
-14.2
-14.5
-12.9
-
-
-
-
-
-
Return Loss TX HB
10
Return Loss (dB)
0
2.17 GHz
-8.428 dB
-10
-20
Antenna HB
TX HB
-30
0.0003
Figure 25
2
4
6
Frequency (GHz)
8
10
Return Loss of HB TX RF port
Application Note AN384
24
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
4.2.6
Antenna to port and Port to Port Isolation HB path
Apply to the Table 16 and Table 17 on the next page.
Table 16
Frequency
(GHz)
0.704
0.716
0.74
0.751
0.824
0.881
0.915
0.942
1.71
1.842
1.96
1.97
2.017
2.14
2.17
2.35
2.593
2.69
3.5
1
Worst case Antenna to Port Isolation High Band part1
TX HB active
ANTHB
ANTHB
TRX1
TX LB
-39
-39
-39
-39
-38
-37
-37
-37
-31
-30
-29
-29
-29
-30
-30
-33
-50
-46
-26
-41
-41
-41
-40
-38
-37
-36
-36
-39
-39
-40
-39
-40
-40
-41
-35
-33
-32
-32
TRX1 active
ANTHB
ANTHB
TRX2
TX HB
-35
-34
-34
-34
-33
-33
-32
-32
-29
-29
-28
-28
-28
-27
-27
-26
-25
-24
-22
-45
-45
-45
-45
-44
-43
-43
-43
-37
-37
-38
-38
-38
-39
-40
-39
-40
-40
-44
TRX2 active
ANTHB
ANTHB
TRX3
TRX1
-35
-35
-34
-34
-33
-33
-33
-32
-29
-28
-28
-28
-28
-27
-27
-26
-25
-24
-22
-37
-37
-36
-36
-36
-35
-35
-35
-31
-31
-30
-30
-30
-29
-29
-28
-26
-26
-26
TRX3 active
ANTHB
ANTHB
TRX4
TRX2
-34
-34
-34
-34
-33
-33
-32
-32
-29
-29
-29
-29
-29
-28
-28
-27
-26
-25
-20
-33
-33
-32
-32
-32
-31
-31
-31
-27
-27
-26
-26
-26
-26
-26
-25
-23
-23
-20
TRX4 active
ANTHB
ANTHB
TRX5
TRX3
-41
-41
-40
-40
-39
-38
-38
-38
-31
-30
-30
-30
-30
-29
-29
-29
-28
-28
-23
-34
-34
-34
-33
-33
-32
-32
-32
-29
-28
-28
-28
-28
-28
-28
-28
-26
-26
-21
TRX5 active
ANTHB
ANTHB
TRX6
TRX4
-43
-42
-42
-42
-40
-39
-38
-38
-29
-28
-27
-27
-26
-26
-25
-24
-23
-22
-18
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher) Isolation
Application Note AN384
25
Revision 1.0, 2015-10-03
-38
-37
-37
-37
-36
-36
-35
-35
-32
-32
-31
-31
-31
-31
-31
-30
-28
-27
-23
TRX6 active
ANTHB
ANTHB
ANT LB
TRX5
-43
-43
-43
-43
-42
-41
-40
-40
-39
-40
-44
-45
-48
-47
-42
-26
-31
-32
-32
-38
-38
-38
-38
-37
-37
-36
-36
-31
-30
-30
-30
-30
-29
-29
-28
-26
-25
-21
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Table 17
Frequency
(GHz)
0.704
0.716
0.74
0.751
0.824
0.881
0.915
0.942
1.71
1.842
1.96
1.97
2.017
2.14
2.17
2.35
2.593
2.69
3.5
1
Worst case Port to Port Isolation High Band part1
TX HB active
TX HB
TX HB
TRX1
TX LB
TRX1 active
TRX1
TRX1
TRX2
TX HB
TRX2 active
TRX2
TRX2
TRX3
TRX1
TRX3 active
TRX3
TRX3
TRX4
TRX2
TRX4 active
TRX4
TRX4
TRX5
TRX3
TRX5 active
TRX5
TRX5
TRX6
TRX4
-37.3
-37.2
-36.9
-37
-36.3
-35.8
-35.4
-35.3
-30.3
-29.3
-28.5
-28.5
-28.3
-28.4
-28.6
-31
-35.5
-38.1
-42.7
-33.1
-32.9
-32.6
-32.6
-32
-31.5
-31.3
-31.2
-25.8
-24.8
-24.1
-24
-23.7
-22.9
-22.7
-21.7
-20.4
-19.9
-19.6
-33.2
-33
-32.7
-32.6
-32
-31.5
-31.2
-31
-25.3
-24.4
-23.6
-23.5
-23.2
-22.3
-22.2
-21.1
-19.8
-19.4
-18.5
-32.9
-32.7
-32.6
-32.5
-31.8
-31.3
-31.2
-30.9
-26
-25.1
-24.4
-24.4
-24.1
-23.3
-23.1
-21.9
-20.3
-19.6
-17.7
-38.8
-38.7
-38.4
-38.2
-37.2
-36.6
-36.3
-36
-28.4
-27.5
-26.8
-26.7
-26.4
-25.6
-25.6
-24.7
-23.6
-23.2
-21.1
-41.5
-41.4
-41.1
-40.8
-39.5
-38.4
-37.9
-37.4
-28
-27
-26.1
-26
-25.7
-24.9
-24.8
-23.8
-22.4
-22
-18.8
-34
-33.8
-33.6
-33.6
-33
-32.5
-32.3
-32
-38.5
-38.6
-38.2
-38.4
-38.6
-38.7
-38.6
-35.6
-35.5
-35.3
-31.1
-39.3
-39.2
-39.1
-38.9
-38.1
-37.6
-37.3
-37
-31.3
-31.6
-32.3
-32.3
-32.8
-33.9
-34.3
-37.4
-39.1
-39.9
-45.6
-35
-35
-34.7
-34.5
-34
-33.5
-33.2
-33
-27.3
-26.5
-25.6
-25.5
-25.2
-24.4
-24.2
-23.3
-21.9
-21.5
-20.9
-31.6
-31.5
-31.2
-31.2
-30.6
-30.1
-29.9
-29.7
-24.2
-23.2
-22.4
-22.3
-22
-21.2
-21
-20
-18.6
-18.2
-17.9
-32.9
-32.7
-32.6
-32.4
-31.8
-31.4
-31.1
-30.8
-25.3
-24.4
-23.7
-23.6
-23.3
-22.5
-22.4
-21.3
-19.9
-19.4
-18.4
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher) Isolation
Application Note AN384
26
Revision 1.0, 2015-10-03
-35.6
-35.4
-35.2
-34.9
-34.5
-33.9
-33.7
-33.4
-28.1
-27.3
-26.6
-26.4
-26.2
-25.4
-25.2
-24
-22.4
-21.8
-19.6
TRX6 active
TRX6 ANT
TRX6
LB
TRX5
-49.1
-49.1
-48.8
-47.6
-46.6
-44.9
-44.1
-43.4
-41.7
-42.8
-46.2
-47.2
-50.9
-49.8
-44.6
-28.4
-33.1
-34.4
-33.3
-36.1
-36.1
-36.1
-35.5
-34.9
-34.6
-34.1
-34
-27.3
-26.3
-25.4
-25.3
-24.9
-24.1
-23.9
-22.7
-21.5
-21
-18.7
Antenna Switch Module with integrated MIPI RFFE Interface
Small Signal Characteristics of BGSF1717MN26
Isolation ANT to HB paths
0
Isolation (dB)
-20
-40
-60
-80
TRx1 to ANTHB
HB active
TRx3 to ANThB
TRx2 active
TRx5 to ANT HB
TRx4 active
ANTLB to ANTHB
TRx6 active
TxLB to ANTHB
HLB active
TRX1 to ANTHB
TRX2 active
TRx3 to ANTHB
TRx4 active
TRx5 to ANTHB
TRx6 active
TRx2 to ANT HB
TRx1 active
TRx4 to ANTHB
TRx3 active
TRx6 to ANTHB
TRx5 active
TxLB to ANTHB
TRX1 active
TRx2 to ANTHB
TRx3 active
TRx4 to ANTHB
TRx5 active
-100
0.0003
Figure 26
2
4
6
Frequency (GHz)
8
10
Worst case Antenna to Port Isolation High Band part1
Isolation HB paths to HB paths
0
Isolation (dB)
-20
-40
-60
-80
-100
TRx1 to TxHB
HB active
TxLB to TRx1
TRX1 active
TRx4 to TRx3
TRx3 active
TRx3 to TRx4
TRx4 active
ANTLB to TRx6
TRx6 active
TxLB to TxHB
HB active
TRx3 toTRx2
TRx2 active
TRx2 toTRx3
TRx3 active
TRx6 to TRx5
TRx5 active
TRx5 to TRx6
TRx6 active
TRx2 to TRx1
TRx1 active
TRX1 to TRX2
TRX2 active
TRx5 to TRx4
TRx4 active
TRx4 to TRx5
TRx5 active
-120
0.0003
Figure 27
2
4
6
Frequency (GHz)
Worst case Port to Port Isolation High Band part1
8
10
Worst case isolation: Isolation between neighbor port of the active port, any other port have better (higher)
Isolation
1
Application Note AN384
27
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Non-Linear performance of BGSF1717MN26
5
Non-Linear performance of BGSF1717MN26
Smart phones today can operate across several cellular bands covering GSM / EDGE / CDMA / UMTS /
WCDMA / LTE/TD-SCDMA / TD-LTE / LTE-A. The design of the RF front-end part in modern cellular phones is
becoming increasingly complex and demanding due to the increasing number of frequency bands and
modes that the phone needs to support. One of the main components of the RF front-end is the antenna
switch that selects which transmitter (TX)/receiver (RX) path can be connected to the antenna. The RF
switch has to satisfy high linearity requirements. The following material describes some of the main
challenges of antenna switches in mobile applications.
Modern smartphones are multi-mode devices that are capable of connecting to 2G, 3G and 4G networks.
These networks often use different frequency bands. The smartphone’s RF frontend must therefore include
band-specific components. In order to appropriately route signals for a given mode and band of operation,
a high-performance RF switch is an essential component of the front-end circuitry. The performance
requirements of the RF switch are discussed in the following sections.
5.1
Intermodulation
Intermodulation Distortion (IMD2 and IMD3) is a parameter that describes the linearity of a device under
multi-tone conditions. The intermodulation between different frequency components generates undesired
output frequencies at the sum and difference frequencies of the input tones, and at multiples of those sum
and difference frequencies. Some of these possible intermodulation scenarios are shown in the Figure 28.
In this example, the transmitted (Tx) signal from the main antenna is coupled into the diversity antenna
with high power. This signal (20 dBm) and a received jammer signal (-15 dBm) are entering the switch.
Certain combinations of the TX and jammer frequencies are producing second- and third-order
intermodulation products that fall into the desired reception band, and reduce the sensitivity of the
receiver.
In Table 18 and Table 20 test conditions Band I and V and the linearity specifications for an undisturbed
communication are given.
Application Note AN384
28
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Non-Linear performance of BGSF1717MN26
Low
Band
Main
HB LB
BT
WLAN
Navigation
Wifi
FM
High
Band
CB
Radio
TV
...
diversity
PA
PA
PA
Rx1
Tx1
Txn
Rxn
Rx1
Figure 28
Block diagram of RF Switch intermodulation
5.1.1
Intermodulation Measurement Setup
Rxn
Rx2/3
Load
-20dB
-6 dB
IMD Product
reference Plane
Tx
Signal
Generator
Power
Amplifier
Circulator
Blocker
Signal
Duplexer
Tunable
Bandpass
Filter
-3 dB
ANT
Phase Shifter /
Delay Line
DUT
Tx
-6dB*
-20dB
ANT
Tunable
Bandpass
Filter
Signal
Generator
Rx
Signal
Analyzer
Figure 29
-6 dB
Power reference plane
regarding Specification
Intermodulation Measurement Test Setup
The test setup for the IMD measurements has to provide a very high isolation between RX and TX signals. As
an example the test set-up for the high band is shown in the Figure 29. In practice, a laboratory-graded
duplexer with an isolation of 80 dB is used. In the Figure 30 and Figure 31 the results for IMD measurements
in Band I and V are given. For each distortion scenario there is a minimum and a maximum value given. This
variation is caused by a phase shifter connected between the switch and the duplexer. In the test set-up a
phase shifter represents a not ideal matching of the switch to a 50 Ohm load.
Application Note AN384
29
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Non-Linear performance of BGSF1717MN26
5.1.2
Intermodulation Measurement conditions for Band I
Table 18
Test conditions and specifications of IMD measurements
Band 1
TX
Test case
FIN (MHz)
PIN (dBm) CW
IMD3
IMD2 low
IMD2 high
1950
20
5.1.3
Interferer
FIN (MHz)
PIN (dBm) CW
1760
190
-15
4090
IMD product
FIMD (MHz)
2140
Intermodulation Measurement Results for Band I
IMD Band I
IMD Test Set-up One (left)
Tx 1950 MHz
PBL = -15 dBm
Rx 2140 MHz
T = 25°C
BGSF1717MN26
IMD2Low
ANT_HB - TRX1
Blocker
Vdd
Min
Max
Min
Max
fb = 190 MHz
PTX = 20 dBm
3,3
-110,7
-101,2
-109,66
-102,6
IMD2High
ANT_HB - TRX1
Table 19
ANT_HB - TX_HB
Blocker
Vdd
Min
Max
Min
Max
fb = 4090 MHz
PTX = 20 dBm
3,3
-119,5
-115,8
-132,1
-123,4
IMD3
Figure 30
ANT_HB – TX_HB
ANT_HB - TRX1
ANT_HB - TX_HB
Blocker
Vdd
Min
Max
Min
Max
fb = 1760 MHz
PTX = 20 dBm
3,3
-131,0
-127,8
-132,1
-121,7
Intermodulation measurement results for Band I
Typical and maximal value of intermodulation products in dBm for Band I
IMD2 Low
IMD2 High
IMD3
Typ.
Max.
Typ.
Max.
Typ.
Max.
-106,0
-101,2
-122,7
-115,8
-128,2
-121,7
Application Note AN384
30
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Non-Linear performance of BGSF1717MN26
5.1.4
Intermodulation Measurement conditions for Band V
Table 20
Test conditions and specifications of IMD measurements
Band 1
TX
Testcase
FIN (MHz)
PIN (dBm) CW
IMD3
IMD2 low
IMD2 high
835
20
5.1.5
Interferer
FIN (MHz)
PIN (dBm) CW
790
45
-15
1715
IMD product
FIMD (MHz)
880
Intermodulation Measurement Results for Band V
IMD Band V
IMD Test Set-up One (left)
Tx 835 MHz
PBL = -15 dBm
Rx 880 MHz
T = 25°C
BGSF1717MN26
IMD2Low
ANT_HB - TRX1
ANT_HB - TX_HB
ANT_LB - TX_LB
ANT_LB - TRX7
ANT_LB - TRX10
Blocker
Vdd
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
fb = 45 MHz
PTX = 20 dBm
3,3
-105,7
-102,4
-103,7
-102,1
-108,9
-104,5
-106,9
-102,6
-107,4
-103,6
IMD2High
ANT_HB - TRX1
ANT_HB - TX_HB
ANT_LB - TX_LB
ANT_LB - TRX7
ANT_LB - TRX10
Blocker
Vdd
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
fb = 790 MHz
PTX = 20 dBm
3,3
-134,1
-127,8
-134,4
-127,5
-133,9
-126,3
-135,7
-128,1
-134,9
-127,8
IMD3
ANT_HB - TRX1
ANT_HB - TX_HB
ANT_LB - TX_LB
ANT_LB - TRX7
ANT_LB - TRX10
Blocker
Vdd
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
fb = 1715 MHz
PTX = 20 dBm
3,3
-132,4
-127,6
-136,0
-129,9
-132,4
-128,5
-135,7
-125,7
-134,0
-127,2
Figure 31
Table 21
Intermodulation measurement results for Band V
Typical and maximal value of intermodulation products in dBm for Band V
IMD2 Low
IMD2 High
IMD3
Typ.
Max.
Typ.
Max.
Typ.
Max.
-104,8
-102,4
-131,1
-126,3
-130,9
-125,7
Application Note AN384
31
Revision 1.0, 2015-10-03
Antenna Switch Module with integrated MIPI RFFE Interface
Non-Linear performance of BGSF1717MN26
5.2
Harmonic Distortion
Harmonic distortion is another important parameter for the characterization of an RF switch. RF switches
have to withstand high RF levels, up to 36 dBm. This high RF power at the input of a switch generates
harmonics of the waveform that is present. These harmonics (2nd and 3rd) can interfere with other reception
bands or can cause distortion in other RF applications (GPS, WLan) within the mobile phone.
Load
-20dB
Directional
Coupler
-20dB
-3 dB
Signal
Generator
Power
Amplifier
Circulator
F = Ffundamantel
Lowpass Filter
Ffilter ≥ Ffundamental
A
measurement
Pin (Ffundamental)
Power meter
B
-3dB
measurement
Pout (Ffundamental)
DUT
Tx
-10dB
Signal
Analyzer
Highpass Filter
Ffundamental
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