ANT-A72GLA-TW-N and ANT-A72GLA4-TW-N
Antennas
The ANT-A72GLA-TW-N and
ANT-A72GLA4-TW-N are active
antennas designed to operate at
the GPS L1 and L2 frequencies,
1575.42 and 1227.60 MHz and
across the L-Band from 1525 to
1560 MHz. The antennas are
aircraft certified for navigation.
This guide provides the information needed to install and use the
antenna.
ADDITIONAL EQUIPMENT REQUIRED
• A device with an antenna input port that both receives the RF
signal and provides 2.5 to 24.0 VDC to the antenna is required
to set up the ANT-A72GLA-TW-N or ANT-A72GLA4-TW-N.
(NovAtel GPS receivers provide the necessary power through
their antenna RF connectors.)
• Coaxial cable with a male TNC connector
INSTALLING THE ANTENNA
Both the input DC power and the output RF signal flow over a
single coaxial cable connected to the unit's TNC female
connector.
The antenna is attached to a surface by means of an ARINC-743
Bolt Pattern.
Four screws pass through the housing of the antenna.
Install the antenna as follows:
1. Place the o-ring into the groove on the antenna base (o-ring
supplied).
Note:
User-supplied o-ring grease can be used to hold the o-ring in the
groove during installation.
2. Pre-drill the mounting holes and the connector hole on the
surface. Refer to the Mechanical Drawings section of this
guide for details on the ARINC-743 mounting pattern.
3. Attach the antenna to the surface using the four mounting
screws supplied. The o-ring will compress and create a seal
between the surface and the antenna.
Ref. #
Description
Ref.#
Description
1
Antenna
4
O-ring
2
Countersink screws
5
Pre-drilled mounting holes
3
Mounting surface
4. Remove the dust cap from the antenna’s TNC connector.
5. Attach the male TNC connector of the coaxial cable to the
antenna’s TNC connector.
6. Attach the other end of the coaxial cable to the antenna input
port of the receiving device. The receiving device must be
able to provide power as detailed in the
SPECIFICATIONS
section of this guide. All NovAtel GPS receivers provide the
necessary power through their antenna RF connectors.
The graphic above shows examples of where the ANT-A72GLA-
TW-N or ANT-A72GLA4-TW-N antenna may be located on an
aircraft or vehicle (not to scale).
ANTENNA CARE
The ANT-A72GLA-TW-N and ANT-A72GLA4-TW-N are
designed to withstand the elements, including rain, snow and
dust. However, to ensure your antenna performs optimally, keep
the radome clean and brush off any ice and snow. In addition,
ensure the TNC connector remains clean and dry and replace
the dust cap when a cable is not connected.
SPECIFICATIONS
USER GUIDE
1
2
3 4 5
1
3
2
4
Ref.# Description
1
Antenna screwed into
place
2
Surface
3
TNC connector (male)
4
Coaxial cable (female)
RF
3 dB pass band (typical)
L1:
1575.42 ±12 MHz
L2:
1227.60 ±12 MHz
LB:
1542.50 ±17.5 MHz
Out-of-band rejection (typical)
40 dBc
Gain at zenith (
= 90°) (min)
L1: +4.1 dBic, L2:+3.9 dBic,
LB: +5.7 dBic
Gain roll-off (zenith to horizon)
L1/LB: +8 dB, L2:+8 dB
LNA gain
ANT-GLA-TW-N:
33 dB ±3
ANT-GLA4-TW-N:
40 dB ±3
Polarization
Right-hand circular
Noise figure (typical)
1.9 dB
Nominal impedance
50
VSWR
1.5 : 1
POWER
Input voltage
2.5 - 24.0 VDC
Current
35 mA
PHYSICAL
Size
Width 76.20 mm (3.000”)
Length 119.38 mm (4.700”)
Height 20.00 mm (0.788”)
Weight
191 g (6.8 oz.)
ENVIRONMENTAL
Maximum altitude
21,336 m (70,000 ft.)
Operating temperature
-55°C to +85°C (-67°F to +185°F)
Storage temperature
-55°C to +85°C (-67°F to +185°F)
Designed to meet these
standards
RTCA DO-160D, RTCA DO-228,
MIL-C-5541, MIL-E-5400,
MIL-I-45208A, MIL-STD-810
and SAE J1455
