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US 4,072,949 AGranted
Range gate walk-off of compressive radar
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorLeRoy B. Van Brunt
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Abstract
The invention involves an electronic countermeasure technique which is used gainst a pulse compression, random PRF, frequency diverse radar by stretching a pulse received from the radar before returning it. By progressively delaying the pulse until its delay is greater than the range gate of the radar, the return pulse to the radar is either blocked entirely or else it is received as a spurious, misleading echo.
Claims7
A range gate walk off device to be used as a countermeasure to radar reception, comprising:
- input terminal means for receiving enemy radar signals;
- a plurality of traveling wave tubes connected in series to receive, modify and amplify the signals;
- delay means and gating means connected in series with each other and in parallel with one of the traveling wave tubes to comprise an RF memory loop;
- detection means, connected to the gating means, for detecting the received signals and opening the gating means when a signal is received;
- and
- output terminal means for transferring the modified signal to another device.
3 more elements
Dependencies are inferred from the claim text.