Buried Antenna (Below The Skin Covering Or Glareshield) Mounting; Carbon/Glass Buried Antenna Area - Garmin G3X Installation Manual

13.3.3 Buried Antenna (below the skin covering or glareshield) Mounting

There are potential performance issues related to buried antennas that the kit builder/installer should be
aware of prior to electing to install a buried antenna. See also
Glareshield.
• Some gain of the antenna may be lost as the signal needs to penetrate through the skin of
the aircraft. The loss may not be apparent, but under the some of the worst case signal
scenarios signal availability may be affected.
• The materials in some aircraft are not suitable for GPS signals to penetrate, care should be
taken to properly modify the aircraft structure to accommodate this. Modifications of this
sort are not recommended or inferred by Garmin or the installation of the GDU 37X, and
the installer should seek the guidance of the kit manufacture for such modifications.
• XM – FIS antennas may typically be buried without performance impact if the overlying
material is fairly transparent to the satellite signal.
Figure 13-2 shows example areas of some mounting locations which have been used. Low satellite
reception and tracking are compromised in these installations due to fuselage and tail blockage. It is not
possible to determine the full impact of these locations, however initial flight testing has not shown any
significant impact to availability, your results may vary.
G3X Installation Manual - GPS/XM Antenna Installation
Page 13-6
Figure 13-2 Carbon/Glass Buried Antenna Area
Section 13.6.2, Non-structural Installation to
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