17
UAV-1001006-001
ECCN 7A994
1.1 Antenna Installation with UAT Transceiver Antenna
Note: The supplied UAT antenna or an RF equivalent must be connected to the
echoUAT in order for the system to be operable.
The following considerations should be taken into account when
determining an acceptable location for the antenna.
•
The UAT antenna should be separated from any projections, the
engine(s) and propeller(s). The antenna should also be separated
from landing gear doors, access doors or other openings which will
interrupt the ground plane of the antenna field.
•
The antenna should be mounted on the bottom surface of the aircraft
and in a vertical position when the aircraft is in level flight.
•
Avoid mounting the antenna within 1 meter of an existing transponder
antenna, ADF sense antenna or any COMM antenna and 2 meters
from the DME antenna.
•
Where practical, plan the antenna location to minimize the cable
length between the echoUAT unit and the antenna. Avoid sharp
bends in the cable to minimize signal distortion or signal loss between
the echoUAT unit and the antenna.
The RF coaxial cable connection to the antenna should be protected from
exposure to liquids and moisture as well as edges of material that may
damage the cable.
The echoUAT mono-pole antenna relies on a ground plane for correct RF
propagation characteristics and pattern. For ideal performance, the ground
plane should be large relative to the wavelength of the transmission. When
mounted in a metal skinned aircraft the metal skin serves as the ground
plane. For a composite or fabric covered aircraft a metallic ground plane
should be fabricated and the antenna mounted in the center of the ground
plane.
The ground plane should be as large as practical but the smallest practical
ground plane for correct operation is 8x8 inches. The thickness of the
material used to construct the ground plane is not critical, providing it is
conductive. A variety of mesh, grid and foil products are available for use
Содержание echoUAT
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