Datasheet
ANT-2.4-WRT-ccc
2.4 GHz External Panel-Mount Antenna
The ANT-2.4-WRT is a low-profile, panel-mount
dipole antenna designed for 2.4 GHz ISM
frequency band applications such as Bluetooth®
and ZigBee®.
The ANT-2.4-WRT antenna’s compact size allows
it to be mounted in applications requiring a low
profile and external antenna performance, such as
wireless vending and traffic control equipment.
The ANT-2.4-WRT antenna is designed with an
integrated counterpoise that eliminates the need
for additional ground plane in the product, making
it ideal for applications with non-conductive or RF
transparent enclosures.
ANT-2.4-WRT-SMA Shown
Connector options for the ANT-2.4-WRT antenna
are: SMA plug (male pin), RP-SMA plug (female
socket), MHF1/U.FL-type plug (female socket), or
MHF4-type plug (female socket).
Features
Applications
• Performance at 2.4 GHz
― VSWR: ≤ 1.5
― Peak Gain: 9.1 dBi
― Efficiency: 66%
• Low-profile
― Height: 10.0 mm (0.40 in)
― Diameter: 19.0 mm (0.75 in)
• Mounts permanently with pressure sensitive
adhesive ring and provided nut
• Single-band WiFi/WLAN/802.11
― WiFi 4
• 2.4 GHz ISM applications
― Bluetooth®
― ZigBee®
• U-NII and ISM applications
• Internet of Things (IoT) devices
• Smart Home networking
• Sensing and remote monitoring
Ordering Information
Part Number
Description
ANT-2.4-WRT-UFL-100
Antenna, 100 mm (3.94 in) of 1.32 mm coaxial cable, MHF1/U.FL-type plug (female socket)
ANT-2.4-WRT-UFL-150
Antenna, 150 mm (5.91 in) of 1.32 mm coaxial cable, MHF1/U.FL-type plug (female socket)
ANT-2.4-WRT-UFL
Antenna, 216 mm (8.50 in) of 1.32 mm coaxial cable, MHF1/U.FL-type plug (female socket)
ANT-2.4-WRT-MHF4
Antenna, 216 mm (8.50 in) of 1.13 mm coaxial cable, MHF4-type plug (female socket)
ANT-2.4-WRT-RPS
Antenna, 216 mm (8.50 in) of RG-174 coaxial cable, RP-SMA plug (female socket)
ANT-2.4-WRT-SMA-150
Antenna, 150 mm (5.91 in) of RG-174 coaxial cable, SMA plug (male pin)
ANT-2.4-WRT-SMA
Antenna, 216 mm (8.50 in) of RG-174 coaxial cable, SMA plug (male pin)
Available from Linx Technologies and select distributors and representatives.
WRT Series
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Datasheet
Table 1. Electrical Specifications
ANT-2.4-WRT
Frequency Range
VSWR (max)
Peak Gain (dBi)
Average Gain (dBi)
Adhesive Ring
Efficiency (%)
8-sided plastic nut and mounting shaft
-SMA, -RPS
-MHF1/U.FL
Ø5.3 mm (0.21 in)
Counterpoise
Polarization
Impedance
Wavelength
M11 x 1.0 mm
Linear
50 Ω
1/2-wave
2.4 GHz
2.4 GHz to 2.5 GHz
1.5
9.1
-2.0
Ø19.0 mm
66 (0.75 in)
Omnidirectional
5W
Dipole
Radiation
Max Power
Electrical Type
Electrical specifications and plots measured in free space.
8.0 mm
-MHF1/U.FL
10.0 mm
Table 2. Mechanical
Specifications
(0.32 in)
(0.39 in)
82.5 mm (3.25 in)
Part Number
Connection
Coaxial Cable, minimum
inside bend radius
MHF1/U.FL-type plug
1.32 mm: 6.0 mm (0.24 in)
100 mm = 4.6 g (0.16 oz)
150 mm = 4.9 g (0.17 oz)
216 mm = 5.2 g (0.18 oz)
See Ordering Information for
cable length and termination options
ANT-2.4-WRT-UFL
ANT-2.4-WRT-MHF4
ANT-2.4-WRT-RPS
916
MHF4-type plug
RP-SMA plug
MHz
SMA plug
ANT-2.4-WRT-SMA
-SMA, -RPS
Weight
1.13 mm: 5.0 mm (0.20 in)
216 mm = 5.1 g (0.18 oz)
RG-174: 10.2 mm (0.40 in)
216 mm = 7.0 g (0.25 oz)
RG-174: 10.2 mm (0.40 in)
150 mm = 6.1 g (0.22 oz)
216 mm = 7.0 g (0.25 oz)
-MMCX
-40 °C to +90 °C
Operating Temp. Range
Height: 10.0 mm (0.40 in), Diameter: 19.0 mm (0.75 in)
Dimensions
Packaging Information
The ANT-2.4-WRT antenna is placed in a clear plastic sleeve and sealed in clear plastic bags in quantities of
50 pcs. Bags are packaged in cartons of 250 (5 bags). Distribution channels may offer alternative packaging
options.
Product Dimensions
Figure 1 provides dimensions for the ANT-2.4-WRT series antenna.
Adhesive Ring
8-sided plastic nut and mounting shaft
M11 x 1.0 mm
Ø5.3 mm (0.21 in)
Counterpoise
Ø19.0 mm
(0.75 in)
-SMA, -RPS
-SMA,
-MHF1/-U.FL
-MHF4
8.0 mm
(0.32 in)
32.5 mm (1.28 in)
See Ordering Information for
cable length and termination options
Figure 1. ANT-2.4-WRT Series Antenna Dimensions
2.4
Hex Nut M11 x 1.0 mm
2
10.0 mm
(0.39 in)
-MHF1/
-
WRT Series
ANT-2.4-WRT-ccc
Datasheet
Recommended Mounting
8-s
The recommended enclosure mounting
dimensions areMounting
shown in Figure 2. The ANT-2.4-WRT series
Recommended
antenna is supplied with an integrated closed-cell pressure sensitive adhesive ring which helps seal
-SMA, -RPS
enclosures against external elements. The adhesive ring has a protective plastic backing that
must be
removed prior to installation. A pull tab has been provided for easy removal of the protective backing. The
antenna can be permanently mounted using the provided nut which should be tightened-MHF1/-U.FL
to 4.0 kgf/cm (5 in/
lbs) max. The recommended maximum enclosure wall thickness is 4.70 mm (0.188 in).
Ø5.
C
-MHF4
Ø10.8 mm
(0.43 in)
See O
cable leng
Figure 2. ANT-2.4-WRT Series Antenna Recommended Enclosure Mounting Dimensions
Antenna Orientation
The ANT-2.4-WRT antenna is characterized in two antenna orientations as shown in Figure 3. The antenna
in free space characterizes use of an antenna attached to an enclosure-mounted connector which is
connected by cable to a printed circuit board. Although the antenna is a dipole not requiring a ground
plane for function, characterization with an adjacent ground plane (102 mm x 102 mm) provides insight
into antenna performance when attached directly to a printed circuit board mounted connector. The two
orientations represent the most common end-product use cases.
Free Space
Center of Ground Plane
Figure 3. ANT-2.4-WRT Series Antenna Test Orientations
3
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ANT-2.4-WRT-ccc
Datasheet
Free Space, No Ground Plane
The charts on the following pages represent data taken with the antenna oriented in free space without a
ground plane, as shown in Figure 4.
Figure 4. ANT-2.4-WRT in Free Space, No Ground Plane
VSWR
2500
5
2400
Figure 5 provides the voltage standing wave ratio (VSWR) across the antenna bandwidth. VSWR describes
the power reflected from the antenna back to the radio. A lower VSWR value indicates better antenna
performance at a given frequency. Reflected power is also shown on the right-side vertical axis as a gauge
of the percentage of transmitter power reflected back from the antenna.
VSWR
4
30
3
20
2
1
2400
10
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
Figure 5. ANT-2.4-WRT VSWR, Free Space
4
2480
2490
0
2500
Reflected Power (%)
40
WRT Series
ANT-2.4-WRT-ccc
Datasheet
Return Loss
2500
0
2400
Return loss (Figure 6), represents the loss in power at the antenna due to reflected signals. Like VSWR, a
lower return loss value indicates better antenna performance at a given frequency.
-2
Return Loss (dB)
-4
-6
-8
-10
-12
-14
-16
-18
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 6. ANT-2.4-WRT Return Loss, Free Space
Peak Gain
2500
10
2400
The peak gain across the antenna bandwidth is shown in Figure 7. Peak gain represents the maximum
antenna input power concentration across 3-dimensional space, and therefore peak performance at a given
frequency, but does not consider any directionality in the gain pattern.
Peak Gain (dBi)
5
0
-5
-10
-15
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 7. ANT-2.4-WRT Peak Gain, Free Space
5
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Datasheet
Average Gain
2500
10
2400
Average gain (Figure 8), is the average of all antenna gain in 3-dimensional space at each frequency,
providing an indication of overall performance without expressing antenna directionality.
Average Gain (dBi)
5
0
-5
-10
-15
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 8. ANT-2.4-WRT Antenna Average Gain, Free Space
Radiation Efficiency
2500
100
2400
Radiation efficiency (Figure 9), shows the ratio of power delivered to the antenna relative to the power
radiated at the antenna, expressed as a percentage, where a higher percentage indicates better
performance at a given frequency.
90
80
Efficiency (%)
70
60
50
40
30
20
10
0
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
Figure 9. ANT-2.4-WRT Series Antenna Radiation Efficiency, Free Space
6
2490
2500
WRT Series
ANT-2.4-WRT-ccc
Datasheet
Radiation Patterns
Radiation patterns provide information about the directionality and 3-dimensional gain performance of the
antenna by plotting gain at specific frequencies in three orthogonal planes. Antenna radiation patterns for a
free space orientation are shown in Figure 10 using polar plots covering 360 degrees. The antenna graphic
at the top of the page provides reference to the plane of the column of plots below it. Note: when viewed
with typical PDF viewing software, zooming into radiation patterns is possible to reveal fine detail.
Radiation Patterns - Free Space
XZ-Plane Gain
YZ-Plane Gain
XY-Plane Gain
2400 MHz to 2500 MHz (2450 MHz)
34
35
33
32
31
30
29
28
36 10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
1
2
3
4
34
5
33
6
32
7
31
8
27
30
9
29
10
28
11
27
12
26
25
13
24
14
23
15
22
21
20
19
18
XZ-Plane Gain
17
16
35
36 10
1
2
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
3
4
34
5
33
6
32
7
31
8
26
30
9
29
10
28
11
27
12
25
13
24
14
23
15
22
21
20
19
18
17
YZ-Plane Gain
16
35
36 10
1
2
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
3
4
5
6
7
8
9
10
11
26
12
25
13
24
14
23
15
22
21
20
19
18
17
16
2400 MHz
2450 MHz
2500 MHz
XY-Plane Gain
Figure 10. ANT-2.4-WRT Antenna Radiation Patterns, Free Space
7
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ANT-2.4-WRT-ccc
Datasheet
Center of Ground Plane
The charts on the following pages represent data taken with the antenna oriented at the center of the
ground plane, as shown in Figure 11.
Figure 11. ANT-2.4-WRT Series Antenna at Center of Ground Plane
VSWR
2500
5
2400
Figure 12 provides the voltage standing wave ratio (VSWR) across the antenna bandwidth. VSWR describes
the power reflected from the antenna back to the radio. A lower VSWR value indicates better antenna
performance at a given frequency. Reflected power is also shown on the right-side vertical axis as a gauge
of the percentage of transmitter power reflected back from the antenna.
VSWR
4
30
3
20
2
1
2400
10
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
Figure 12. ANT-2.4-WRT Antenna VSWR at Center of Ground Plane
8
0
2500
Reflected Power (%)
40
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ANT-2.4-WRT-ccc
Datasheet
Return Loss
2500
0
2400
Return loss (Figure 13), represents the loss in power at the antenna due to reflected signals. Like VSWR, a
lower return loss value indicates better antenna performance at a given frequency.
-2
Return Loss (dB)
-4
-6
-8
-10
-12
-14
-16
-18
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 13. ANT-2.4-WRT Return Loss at Center of Ground Plane
Peak Gain
2500
10
2400
The peak gain across the antenna bandwidth is shown in Figure 14. Peak gain represents the maximum
antenna input power concentration across 3-dimensional space, and therefore peak performance at a given
frequency, but does not consider any directionality in the gain pattern.
Peak Gain (dBi)
5
0
-5
-10
-15
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 14. ANT-2.4-WRT Peak Gain at Center of Ground Plane
9
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Datasheet
Average Gain
2500
10
2400
Average gain (Figure 15), is the average of all antenna gain in 3-dimensional space at each frequency,
providing an indication of overall performance without expressing antenna directionality.
Average Gain (dBi)
5
0
-5
-10
-15
-20
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
2500
Figure 15. ANT-2.4-WRT Antenna Average Gain at Center of Ground Plane
Radiation Efficiency
2500
100
2400
Radiation efficiency (Figure 16), shows the ratio of power delivered to the antenna relative to the power
radiated at the antenna, expressed as a percentage, where a higher percentage indicates better
performance at a given frequency.
90
80
Efficiency (%)
70
60
50
40
30
20
10
0
2400
2410
2420
2430
2440
2450
2460
Frequency (MHz)
2470
2480
2490
Figure 16. ANT-2.4-WRT Antenna Radiation Efficiency at Center of Ground Plane
10
2500
WRT Series
ANT-2.4-WRT-ccc
Datasheet
Radiation Patterns
Radiation patterns provide information about the directionality and 3-dimensional gain performance of the
antenna by plotting gain at specific frequencies in three orthogonal planes. Antenna radiation patterns are
shown in Figure 17 using polar plots covering 360 degrees. The antenna graphic at the top of the page
provides reference to the plane of the column of plots below it. Note: when viewed with typical PDF viewing
software, zooming into radiation patterns is possible to reveal fine detail.
Radiation Patterns - Center of Ground Plane
XZ-Plane Gain
YZ-Plane Gain
XY-Plane Gain
2400 MHz to 2500 MHz (2450 MHz)
34
35
33
32
31
30
29
28
36 5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
1
2
3
4
34
5
33
6
32
7
31
8
27
26
30
9
29
10
28
11
27
12
25
13
24
14
23
15
22
21
20
19
18
XZ-Plane Gain
17
16
35
36 5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
1
2
3
4
34
5
33
6
32
7
31
8
26
30
9
29
10
28
11
27
12
25
13
24
21
20
19
18
17
1
2
3
4
5
6
7
8
9
10
26
12
25
15
22
36 5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
11
14
23
35
16
YZ-Plane Gain
13
24
14
23
15
22
21
20
19
18
17
16
2400 MHz
2450 MHz
2500 MHz
XY-Plane Gain
Figure 17. ANT-2.4-WRT Radiation Patterns
11
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ANT-2.4-WRT-ccc
Datasheet
Website: http://linxtechnologies.com
Linx Offices: 159 Ort Lane, Merlin, OR, US 97532
Phone:
+1 (541) 471-6256
E-MAIL: info@linxtechnologies.com
Linx Technologies reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use
or application. No rights under any patent accompany the sale of any such product(s) or information.
Wireless Made Simple is a registered trademark of Linx Acquisitions LLC. Other product and brand names may be trademarks or registered trademarks of their
respective owners.
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All Rights Reserved
Doc# DS22070-204ANT Replaces (DS21348-204ANT)
