190-01115-01
G3X/G3X Touch Installation Manual - GPS/XM Antenna Installation
Rev. AC
Page 22-30
Minimum Distance from Metal Tube Structure Requirements
Figure 22-31 shows minimum distance from metal tube structure requirements for internal, non-structural
mounting of the antenna. Table 22-7 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 22-31 illustrates the tube diameter (d) and minimum distance (l) references in the Table 22-7.
Figure 22-31 Example Teardrop Footprint Antenna Mounting Under Fabric Skin
.
Table 22-7 Minimum Distance Required Between Tube Structure and Antenna
Illustrated Case
Tube Diameter
d (in)
Minimum
Distance l (in)
Top of antenna at or above the center of the tube structure
(Figure 22-31, top)
0.625
3.6
0.75
4.3
1.00
5.7
1.25
7.2
Top of antenna between the center and bottom of the tube
structure (Figure 22-31, bottom)
0.625
7.2
0.75
8.6
1.00
11.5
1.25
14.3
