Abracon PTM
Introduction to ACA Series
Ceramic Chip Antennas
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ACA Series
Ceramic Chip Antennas
Purpose
To introduce ACA Series, Ceramic Chip Antennas.
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Objective
Present the advantage, performance and applications
of Abracon ACA Series.
Content
21 pages
Learning Time
25 minutes
Welcome to Abracon’s ACA Series; Ceramic Chip Antenna Training Module. This training session will
provide an overview of the key features and benefits; as well as, discuss the applications of this product
series.
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Product - ACA Series
Ceramic Chip Antennas
Abracon ACA Series-Part Numbering
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ACA
Part
Series
101
T
Part
Codes
Packaging
Code
101 to 104
T: Tape & Reel
Blank for Bulk
The ACA Series offers a range of Chip Antennas identified by part codes starting 101 to 104.
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Abracon ACA Series Part Numbering & Descriptions
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Part No
Description /
Band
Frequency
Band (MHz)
Size
ACA-101-T
Chip Antenna WLAN / Bluetooth
/ Zigbee
2400 ~ 2485
4 x 2 x 1.2 mm
ACA-102-T
Chip Antenna
WLAN / Bluetooth
2400 ~ 2485
2 x 1.2 x 1.0 mm
ACA-103-T
Dual Band Chip
Antenna –
WiFi /
Bluetooth & WiFi
ACA-104-T
Chip Antennas –
GPS
2400 ~ 2485
&
5150 ~ 5825
1570 ~ 1580
5 x 2 x 1.2 mm
3 x 1.5 x 1.2 mm
The ACA Series covers Chip Antennas covering 2.45GHz Bluetooth / WiFi and GPS
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Introduction to Chip Antennas
o
An antenna (also known as an aerial) is a transducer
that transmits or receives RF signals by converting
electromagnetic radiation into electrical current, or
vice versa.
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o
Antennas can take many forms but this introduction
will focus on Ceramic Chip Antenna.
o
Radio communications have become ubiquitous across
everyone's daily life's, e.g. WiFi, Cellular Mobile
Phones or Machine-to-machine (MCM) devices
o
These devices communicate by transmitting and
receiving RF signal bands between 700MHz to
5.4GHz.
o
These radio links require high quality radio interface to
support the communication links.
o
To meet selectivity requirements ANTENNA are
critical to. the design
Antennas are a critical design elements that provide the effective launch of the Tx EMF wave and
reception of the Rx signal from free space, providing the initial selectivity of the radio system.
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Example of Block Diagram Bluetooth TCVR
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Block diagram shows application of Chip Antenna in the
2.45GHz Bluetooth TCVR. See also use of BPF, Balun, TCXO and
32.768KHz Xtal in Bluetooth module.
In this Bluetooth example, the 2.45GHz antenna provides the transmission and reception of signals. In
many handheld solution the choice of antenna will be a ceramic chip type. Abracon also provides other
BOM elements for Bluetooth boards or modules; typically SAW BPF, as well as 32.768KHz Crystals
and TCXO used to clock the radio IC are needed.
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Ceramic Chip Antenna Technology
What are Chip Antennas?
Chip antennas come in various sizes and are often seen as small
ceramic blocks with minimal metal artwork and SM pads into which the
signal is launched. The ACA series are constructed from solid high
dielectric ceramic material.
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Chip Antenna summarizes a group of Ceramic Dielectric Antenna of
varied design types including:
- Ceramic Monopole
- Ceramic Loop
- Ceramic Helix
- Ceramic IFA (Inverted F Antenna)
Monopole types
Helix type
Chip Antennas are small ceramic blocks onto which silver patterns are printed to create an antenna
structure. The term Chip Antenna covers a range of types of antenna offering different gains and layout
considerations.
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Ceramic Chip Antenna Technology
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Size of Chip Antenna
Chip Antenna vary with the frequency band, the dielectric (Er) used, and
their design architecture.
Integrated solutions like mobile phones have driven the size of these
down (within the boundaries of technology), so that we see 2.4GHz
parts as small as 2 x 1.2 x 1.0 mm (ACA-102-T)
Types and trade-offs.
Some Chip Antenna designs like Monopole and Loop types require nonground PCB “keep out areas” for mounting; while other types like the
Inverted F type require a ground area under the antenna by design.
Available space is often a key consideration for antenna type.
The “ ceramic loop type” is the smallest but needs added space for traces
and keep out areas.
Designers need to refer to the specific layout, and reproduced accurately
if antenna performance is to be met.
The size of the Chip Antenna is determined by the dielectric constant (Er) of the Ceramic used, the
radio frequency concerned, and the type or design of antenna. Designers need to consider trade-offs of
board space required when picking an antenna.
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Key Features of Chip Antennas
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Use of high dielectric ceramics materials allows compact design.
o
Single or multi-band, across a range of bands, making them ideal for
multi-band applications like Mobile Phone / Tablets.
o
They offer low profile, light weight, small form factor suitable for
compact applications.
o
Excellent gain and directivity performance relative to their size.
o
Ease of matching during application development.
o
Better SAR response than PCB traces .
o
Improved isolation allowing multiple antenna applications.
o
Their omni-directional radiation highly suitable for mobile
communications.
Chip Antennas offer a range of advantages to designers who have restricted space or cannot afford an
external antenna. Key features included compact design, excellent efficiency, better SAR score
(Specific Absorption Rate) compared to other alternatives, and an omni-directional radiation pattern
(like a sphere), ideal for mobile phone applications.
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Ceramic Chip vs. PCB Trace Antennas
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o
Designers have the option to add their antenna as a printed trace
on the PCB, this adds no additional BOM cost, but will increase
the pcb size, and may have other issues as well.
o
A trace antenna manufactured within the printed circuit board
(PCB) is often the first type of interface considered based on cost
o
Ceramic Antenna are often good or even better alternative to trace
antenna solutions
o
The table in the next slide demonstrates the design attributes to
sell Chip Antenna, when compared to cheaper PCB trace solutions.
Designers are constantly faced with reduction of BOM cost. Antennas embedded in the PCB offer a
cost saving solution, but these are rarely the smallest or quickest design solutions on offer. Chip antenna
offer a number of advantages, and this and the following slide cover the trade offs designers face.
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Ceramic Chip vs. PCB Trace Antennas
Comparative Features
Lower manufacturing costs
Simple PCB structure
Larger Bandwidth
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Embedded design
PCB area for Antenna
Close objects cause detune
Antenna performance and tuning
affected by PCB design
Ease of tuning antenna
Design Iteration, improved time to
market
Ease of design changes
Flexible testing and tuning options
Rework Costs to PCB
Chip Antenna
PCB Trace
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Antenna Radiation Patterns
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3D Radiation Pattern shows Omni-directional Pattern
The diagram shows the omni-directional 3D radiation patter of a typical Chip Antenna. This provides
360 degree coverage, and is suited to handheld devices.
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Typical Antenna PCB Matching
1005 matching Capacitors
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Vias
No Ground Area.
Keep Out area
0.5mm Feed line
Please see data
sheets for specific
part layout
The diagram shows a typical pcb layout for a chip antenna, with matching components. Typically these
will need a no-ground region / keep out area, as this is critical for antenna performance.
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What RF Applications need Chip Antenna
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Mobile
Phones
Tablets
Mobile
Gaming
Bluetooth
WLAN
WLAN
802.11a/b/
802.11a/b
g/j/n
/g/j/n
Dual
Band
Dual
Band
GPS
GPS
ACA-101-T &
ACA-103-T
ACA-104-T
ACA-102-T
Dual Band
Bluetooth / WiFi at 2.45GHz and 5.5GHz and GPS offer many applications for Chip Antennas.
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Where Chip Antennas are Utilized
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Bluetooth Applications:
o
Bluetooth exists in many products, such as telephones, tablets, media
players, and gaming like Lego Mindstorms NXT, Playstation 3, PS
Vita, Nintentdo Wii, and HD Headsets, Modems and watches:
o
Bluetooth Headsets / Intercoms
o
Bluetooth Audio Headsets
o
Keyboards / Mouse
o
Games Consoles / Controllers
o
Wireless bridge between two Industrial Ethernet (e.g. PROFINET)
networks.
o
Short range transmission of health sensor data from medical devices
to mobile phone, or dedicated “Telehealth” devices.
o
Personal security applications – tags
The Bluetooth technology offers a wide selection of companies involved with Bluetooth enabled
devices.
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Where Chip Antennas are Utilized
o
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WiFi Applications: The “Internet of Things”
o
The number of Internet-connected devices is the world in 2011 was
estimated at 20 billion by 2020 this is expected to rise to 50 billion
devices.
o
Networking
o
Consumer Electronics
o
Computing and Peripherals
o
Headsets
o
Automotive and Transport
o
Health & Fitness
o
Smart Energy
o
Industrial Communications
The “Internet of Things” offers an increasing wide application of connected or controlled WiFi
solutions. A wide selection of WiFi certified product exist, and provide many applications for Chip
Antennas.
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Where Chip Antennas are Utilized
o
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GPS Applications:
o
GPS devices have different antenna types dependant on their
application. GPS Chip antenna often find applications in smaller and
handheld devices.
o
Navigation devices, Garmin / TomTom etc
o
Vehicles
o
Cycling
o
Walking
o
Survey Equipment
o
Commercial fleet management
o
Car Trackers (anti-theft)
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Tracking of valuable cargoes, and covert tracking of suspects.
o
Agricultural control (Farm vehicles)
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Scientific applications of GPS
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Environmental and atmospheric monitoring,
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Animal behaviour studies,
o
Botanical specimen location
Many GPS enabled devices offer application for Chip Antennas, especially smaller commercial and
handheld solutions, where size and cost are drivers.
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Cost Effective and Fast lead time
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Gain
Peak / Avg
(dBi)
Qty/Reel
Std. L/T
1.09 / -3.49
1K
8Wks
2.6 max
(typ 1.6)
0.6 / -3.48
1K
8Wks
3.0 max
(typ 2.5)
-1.37 / -4.53
1K
8Wks
0.03 / -2.98
1K
8Wks
P/N
Size
VSWR
Max
ACA-101-T
(2.45GHz)
4x2x1.2mm
3.0 max
(typ 2.5)
ACA-102-T
(2.45GHz)
2x1.2x1mm
ACA-103-T
5x2x1.2mm
(2.45 & 5.2GHz)
ACA-104-T
(1575MHz)
3x.1.5x1.2
mm
3.0 max
(typ 2.0)
Website Datasheet: http://www.abracon.com/products.php?search=chipAntenna
The table summarizes the cost effective Chip Antenna solutions offered by Abracon along with the
technology advantages of size, efficiency and gain offered here.
Thank You for your Kind Attention
------Abracon Ceramic Chip Antennas
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