Transponder Antenna - Garmin GTX 45R Installation Manual

3.7

Transponder Antenna

NOTE
For the GTX 45R some types of transponder antennas that utilize thin radiator elements
are only intended for use at 1030 and 1090 MHz. These types of antennas should be
evaluated on a model-by-model basis to determine their suitability for UAT receivers.
The GTX 35R/45R must have an UHF antenna. The antennas in table 3-4 are approved for use with the
GTX 35R/45R. Other antennas are permitted if they meet these specifications:
• Standard 50 ohm vertically polarized antenna with a VSWR < 1.7:1 at 978 MHz and < 1.5:1 at
1090 MHz
• TSO-C66( ), TSO-C74( ), or TSO-C112( ) antennas that also meet the VSWR specification
Manufacturer
Aero Antenna
Comant
Dayton-Granger
Garmin
190-01499-10
Rev. 1
Table 3-4 Acceptable UAT/1090 Antennas
P/N Model/Description
AT130-16 DME Transponder
CI-100 DME Transponder
CI-100-2 DME Transponder
CI-105 DME Transponder
CI-105-3 DME Transponder
CI-105-16 DME Transponder
CI-110-40-30 DME Transponder
CI-110-41-30 DME Transponder
CI-110-60-30 DME Transponder
CI-110-61-30 DME Transponder
L10-611-( ) L-Band Blade
590-0052 or
A-40
013-00219-00
590-0051 or
A-41
013-00174-00
GTX 35R/45R Installation Manual (Non-Certified Aircraft)
Connector
Notes
Type
TNC DC Grounded
BNC Open Circuit
TNC Open Circuit
BNC Open Circuit
BNC Open Circuit
BNC Open Circuit
C Open Circuit
C DC Grounded
C Open Circuit
C DC Grounded
C DC Grounded
TNC Open Circuit
TNC DC Grounded
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