Garmin GTX 45R Installation Manual

Contents

Garmin GTX 45R Installation Manual Manual pdf 29 page image

190-01499-10 GTX 35R/45R Installation Manual (Non-Certified Aircraft)Rev. 1 Page 3-73.12 Antenna ConsiderationsMounting location considerations for the antenna(s) are provided in this section.3.12.1 Transponder AntennaNOTEGround planes must be considered for installations on composite aircraft. Conductivewire mesh, radials, or thin aluminum sheets embedded in the composite material supplythe ground plane to maximize the antenna pattern (gain). This can improve transponderperformance.The antenna mounting must use the aircraft manufacturer’s type certificated antenna location and style.The antenna must be installed in accordance with manufacturer instructions and/or AC 43.12-2AChapter 3.Transponder antenna considerations help the installer to select the best location for the antenna. Theantenna should:• Be attached away from major protrusions, such as engines, nacelles, propellers, and antenna masts.• Be as far as practical from landing gear doors, access doors, or other openings that could affect itsradiation pattern.• Be vertically attached on the bottom of the aircraft.• Not be attached within three feet of the ADF sense antenna or any other communication antenna.• Not be attached within six feet of a DME antenna.• Be attached to a minimum of three feet of cable from the GTX 35R/45R to prevent RFinterference.