Novatel | GPS-302-40 | User guide | Novatel GPS-302-40 User Guide

Novatel GPS-302-40 User Guide
GPS-302-40
USER GUIDE
GM-14915159
Rev 2
February 2019
The GPS-302-40 antenna is designed for airborne use, but works in any mobile application.
The GPS-302-40 is an active GPS antenna, 89.6 mm (3.53 inches) in diameter and operates at the GPS
L1 frequency of 1575.42 MHz and GPS L2 frequency of 1227.60 MHz. The antenna is a spherical radius
molded radome that provides enhanced protection against rain and ice.
The antenna includes the following:
•
•
•
•
internal 40 dB low noise amplifier
bias voltage from 3.8 – 6.0 VDC for operation
band pass filtering
DC bias provided through the coaxial connector
NovAtel offers optional coaxial cables of various lengths to connect the antenna and NovAtel GNSS
receivers.
This guide provides the basic information you need to install and begin using your new antenna.
ADDITIONAL EQUIPMENT REQUIRED
•
•
A device with an antenna input port that both receives the RF signal and provides 3.8 – 6.0 VDC to
the antenna is required for the GPS-302-40. NovAtel GNSS receivers provide the necessary power
through their antenna RF connectors.
Coaxial cable with a male TNC connector
INSTALLING THE ANTENNA

The integrator of this antenna is responsible for ensuring antenna installation meets all the
overall integrated system requirements.

Refer to Section 307 of www.faa.gov/documentLibrary/media/Advisory_Circular/
AC%2043.13-2B.pdf for information about antenna bonding in aircraft applications.
Both the input DC power and the output RF signal use a single coaxial cable connected to the unit's TNC
female connector.
The antenna can be attached to a surface with a square, four bolt, 1.9-inch space mounting pattern as
shown in the Mechanical Drawings section of this guide. Four screws pass through the antenna housing.
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To install the antenna:
1. Install the supplied o-ring into the groove on the antenna base.

User-supplied o-ring grease can be used to hold the o-ring in the groove during
installation.
2. Drill and tap the mounting holes and drill the connector clearance hole on the mounting surface. See
the Mechanical Drawings section for mounting pattern details.
3. Use the four supplied mounting screws to attach the antenna to the mounting surface. The o-ring compresses and creates a seal between the surface and the antenna.

NovAtel recommends thread-locker (not included) on the mounting screws.
2
1
3
Ref. #
1
2
3
4
5
4
Description
Antenna
Countersink screws
Mounting surface
O-ring
Drilled mounting holes
4. Remove the dust cap from the antenna’s TNC connector.
2
5
5. Attach the coaxial cable’s male TNC connector to the antenna’s TNC connector.
Ref.#
1
2
3
4
Description
Mounted antenna
Mounting surface
TNC connector
Coaxial cable
6. Attach the other end of the coaxial cable to the antenna input port on the receiving device. The
receiving device must be equipped to provide power as detailed in the SPECIFICATIONS section of
this guide. All NovAtel GPS receivers provide the necessary power through the antenna RF
connectors.
3
This graphic provides examples of where the antenna may be located on an aircraft or vehicle (not to
scale).
ANTENNA CARE
The GPS-302-40 is designed to withstand the elements, including rain, snow and dust. However, to ensure
that the antenna performs optimally, keep the radome clean and brush off any ice or snow. In addition,
ensure the TNC connector remains clean and dry and replace the dust cap when a cable is not connected.
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SPECIFICATIONS
RF
Band
Operational Band (typical)
L1
L2
1575.42 ±10 MHz
1227.60 ±10 MHz
Free
Space
16-inch
ground
plane
4-foot
ground
plane
Free
Space
16-inch
ground
plane
4-foot
ground
plane
90° zenith
+4.7
+0.4
+3.5
+3.3
+1.5
+4.9
10° elevation
-1.8
-3.2
-2.0
-3.8
-4.0
-3.6
20° elevation
-0.3
-1.0
+0.8
-2.0
-2.0
-0.1
30° elevation
+1.4
+0.9
+1.8
-0.5
0.0
-1.8
60° – 90° elevation
>3.9
+3.4/+0.4
>2.8
>2.7
+2.4/+1.5
>3.0
Beamwidth (dB)
114°
118°
139°
106°
111°
75°
Antenna gain (dBic)
LNA gain
40 dB
Polarization
Right-hand circular
Noise figure (typical)
3 dB
Nominal impedance
50 Ω
VSWR
2.0 : 1
40 dB
POWER
Input voltage
3.8 – 6.0 VDC
Current (typical)
60 mA
PHYSICAL
Radome diameter x height
8.96 cm (3.53 inches) x 2.286 cm (0.9 inches)
Weight
264 g (9.3 ounces)
ENVIRONMENTAL
Maximum altitude
21,336 m (70,000 ft.)
Operating / storage
temperature
-40° C to +85° C (-40° F to +185° F)
Vibration
>30 G
Designed to meet these
standards
DO-160D, MIL-C-5541, MIL-E-5400, MIL-I-45208A and MIL-STD-810
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MECHANICAL DRAWINGS
Dimensions are in inches, followed by [mm]
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PHASE CENTER
Please refer to the Mechanical Drawings before reading this section.
HEIGHT = Vertical phase center offset from antenna reference point or antenna reference plane (ARP),
see the MECHANICAL DRAWINGS section of this guide.
For relative offset numbers and phase center variation (PCV) tables, please visit the U.S. National
Geodetic Survey (NGS) website at www.ngs.noaa.gov/ANTCAL/. Look for ANTCOM ACC3G1215A_XT_1.
Please check our website for updates to this manual at www.novatel.com/Downloads/docupdates.html and
the websites mentioned above.
If you need any further advice on this matter, please visit our website at www.novatel.com. Other methods
of contacting Customer Service can be found on the last panel of this guide.
WEEE
If you purchased a GPS-302-40 antenna in Europe, return it to your dealer or supplier at the end of its life.
The objectives of the European Community's environment policy are, in particular, to preserve, protect and
improve the quality of the environment, protect human health and utilise natural resources prudently and
rationally. Sustainable development advocates the reduction of wasteful consumption of natural resources
and the prevention of pollution. Waste electrical and electronic equipment (WEEE) is a regulated area.
Where the generation of waste cannot be avoided, it should be reused or recovered for its material or
energy. WEEE products may be recognized by their wheeled bin label (
).
See www.novatel.com/products/compliance/environmental-compliance/ for more information.
ROHS
The GPS-302-40 is compliant with the European Union (EU) Restriction of Hazardous Substances (RoHS)
Directive 2011/65/EU.
WARRANTY POLICY
NovAtel Inc. warrants that its Global Navigation Satellite System (GNSS) products are free from defects in
materials and workmanship, subject to the conditions set forth on our web site:
www.novatel.com/products/warranty.
GNSS Antenna™ Modules:
Cables and Accessories:
One (1) Year
Ninety (90) Days
RETURN INSTRUCTIONS
To return products, refer to the instructions found under the Return Policy Tab on the warranty page:
www.novatel.com/products/warranty.
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QUESTIONS OR COMMENTS
If you have any questions or comments, please log a support request with NovAtel Customer Support
using one of the following methods:
Log a Case and Search Knowledge:
Website: www.novatel.com/support
Log a Case, Search Knowledge and View Your Case History: (login access required)
Web Portal: https://novatelsupport.force.com/community/login
E-mail:
support@novatel.com
Telephone:
U.S. and Canada: 1-800-NOVATEL (1-800-668-2835)
International: +1-403-295-4900
© Copyright 2019 NovAtel Inc. All rights reserved.
Unpublished rights reserved under international copyright laws.
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