Radar responder
First Claim
1. A radar responder for transmitting an electric wave signal in response to a radar signal from a searcher'"'"'s radar, comprising:
- FM modulator means for sweeping said electric wave signal across a predetermined frequency deviation width including the reception frequency of said searcher'"'"'s radar a predetermined number of times within a predetermined period to produce a radar responding signal, in response to the reception of said radar signal;
said modulator means including means for modulating said radar responding signal to produce a distinction signal for distinguishing an individual radar responder, and means for abbreviating said distinction signal when said searcher'"'"'s radar is more than a predetermined distance from said radar responder and transmitting said distinction signal in full when said searcher'"'"'s radar is less than said predetermined distance from said radar responder.
1 Assignment
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Accused Products
Abstract
A radar responder for transmitting an electric wave signal which sweeps a predetermined frequency deviation width including the reception frequencies of the searcher'"'"'s radar a plurality of times, responding to the pulse-modulated radar signal from the searcher'"'"'s radar. The responder is provided with a high frequency FM modulator having said frequency deviation width, generates a radar responding signal which repeats said sweeps a predetermined number of times with a predetermined period, and a distinction signal for distinguishing individual radar responder which repeats said sweeps with said period in a predetermined pattern.
20 Citations
5 Claims
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1. A radar responder for transmitting an electric wave signal in response to a radar signal from a searcher'"'"'s radar, comprising:
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FM modulator means for sweeping said electric wave signal across a predetermined frequency deviation width including the reception frequency of said searcher'"'"'s radar a predetermined number of times within a predetermined period to produce a radar responding signal, in response to the reception of said radar signal; said modulator means including means for modulating said radar responding signal to produce a distinction signal for distinguishing an individual radar responder, and means for abbreviating said distinction signal when said searcher'"'"'s radar is more than a predetermined distance from said radar responder and transmitting said distinction signal in full when said searcher'"'"'s radar is less than said predetermined distance from said radar responder. - View Dependent Claims (2, 3, 4, 5)
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Specification