Example: air traffic controller
Simple Receive Only Loop Antenna Constructed
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Simple receive only loop antenna constructed by Phil ...
www.philipstorr.id.auSimple receive only loop antenna constructed by Phil VK5SRP – Page 4 While nothing can protect the antenna from a direct lightening strike the open relay contacts do offer some protection from surges caused by nearby thunderstorms. The loop can also have a gas discharge device connected across its terminals providing a second line of defence
RCWL-0516
automotionsensor.comIf ft is the transmitted frequency, fr is the refected frequency (as measured by the common transmit/receive antenna on the sensor), v is the speed of the target relative to the sensor (negative if receeding, positive if advancing toward sensor), c is the speed of light and fd (fr-fd) is the doppler shift, then: fr ft (c + v) / (c – v)