18
UAV-1001006-001
ECCN 7A994
700mm on each side. Anything much larger than that size is unlikely to
result in significant further improvement.
The thickness of the material used to construct the ground plane is not
critical, providing it is sufficiently conductive. A variety of proprietary mesh
and grid solutions are available. Heavyweight aluminum foil meets the
technical requirement, but obviously needs to be properly supported.
7.8.2 Antenna Cable
The echoUAT is designed to meet Class B1S. Excessive loss in the cable
and connectors will degrade both transmitter output power and receiver
sensitivity.
An acceptable cable:
•
has less than 1.5dB loss for the run length needed,
•
has a characteristic impedance of 50ohms,
•
has double braid screens or has foil and braid screen.
Once the cable run length is known, a cable type with low enough loss per
meter that meets the above requirements can be chosen. Longer runs
require lower loss cable.
The following table is a guide to the maximum usable lengths of some
common cable types. Actual cable loss varies between manufacturers.
There are many variants, and the table is based on typical data. Use it as a
guide only and refer to the manufacturer’s data sheet for your specific
chosen cable for accurate values.
Содержание echo
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Страница 30: ...30 UAV 1001006 001 ECCN 7A994 Appendix A Interconnect Diagrams ...
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Страница 37: ...37 UAV 1001006 001 ECCN 7A994 Example Wiring ...