초록 ▼

An improved countermeasure technique for providing jamming signals against obing radar, especially COSRO (conical scan on receive only) radar. A power spectrum (or comb) is generated having specific spectral line separation over a frequency band of the expected range of scan frequencues. The line sp

An improved countermeasure technique for providing jamming signals against obing radar, especially COSRO (conical scan on receive only) radar. A power spectrum (or comb) is generated having specific spectral line separation over a frequency band of the expected range of scan frequencues. The line spectrum, preferably having a flat topped envelope is then swept as a unit so that all frequencies with in a range of expected scan frequencies are traversed at least once by a spectral line. The swept comb is used to modulate a repeater pulse train transmitting to a lobing radar. The sweep of the comb causes at least one spectral line to beat with the scan frequency of the radar resulting in antenna oscillation and sidelobe lockup by deception of the angle-tracking circuits of the radar.

대표청구항 ▼

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [1.] A method of deceiving the angle tracking circuits of a lobing radar comprising:receiving a radar beam from a lobing radar;generating a signal having a frequency spectrum forming a comb defined by a series of

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [1.] A method of deceiving the angle tracking circuits of a lobing radar comprising:receiving a radar beam from a lobing radar;generating a signal having a frequency spectrum forming a comb defined by a series of spectral lines having an envelope over a given frequency range;sweeping the comb as a unit over a range of expected scan frequencies of the radar such that all frequencies within said range of expected scan frequencies are traversed at least once by a spectral line;modulating the received beam with the swept comb signal, and;retransmitting the modulated beam to the radar.