Garmin G3X Installation Manual page 237

Minimum Distance from Metal Tube Structure Requirements
Figure 20-31 shows minimum distance from metal tube structure requirements for internal, non-structural
mounting of the antenna. Table 20-7 presents minimum distance requirements between the tube structure
and the antenna for cases where the antenna sits underneath the fabric in a metal-tube structure aircraft.
Figure 20-31 illustrates the tube diameter (d) and minimum distance (l) references in the Table 20-7.
Figure 20-31 Example Teardrop Footprint Antenna Mounting Under Fabric Skin
.
Table 20-7 Minimum Distance Required Between Tube Structure and Antenna
Illustrated Case
Top of antenna at or above the center of the tube structure
(Figure 20-31, top)
Top of antenna between the center and bottom of the tube
structure (Figure 20-31, bottom)
190-01115-01
Rev. AA
G3X/G3X Touch Installation Manual - GPS/XM Antenna Installation
Tube Diameter
d (in) Distance l (in)
0.625
0.75
1.00
1.25
0.625
0.75
1.00
1.25
Minimum
3.6
4.3
5.7
7.2
7.2
8.6
11.5
14.3
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