초록 ▼

Known electronic countermeasures systems have difficulty handling some modern radar signals, for example frequency agile, frequency sliding or frequency coded signals. The invention disclosed overcomes the problems of the prior art by using an analog frequency dividing system to virtually instantane

Known electronic countermeasures systems have difficulty handling some modern radar signals, for example frequency agile, frequency sliding or frequency coded signals. The invention disclosed overcomes the problems of the prior art by using an analog frequency dividing system to virtually instantaneously down-convert received signals in octave steps and in octave stages into the frequency regimes associated with the operation of processing devices, such as analog to digital converters, digital logic devices, surface acoustic wave devices, and charge coupled devices. Those processed signals which are selected for retransmission, perhaps in a modified form, are then up-converted into the region of the received signal by the appropriate number of stages of frequency multipliers. Any modification in such signal parameters as signal duration, delay, frequency, phase, power, amplitude or spectral content may be incorporated prior to the first multiplication stage, between multiplication stages, after the last multiplication stage, or any combination of the above.

대표청구항 ▼

An electronic countermeasures system comprising means for receiving transmitted microwave signals and feeding them to a non-heterodyning analog microwave frequency divider system having n stages, where n is an integer, each stage dividing frequencies applied to it by a factor of 2, said frequency di

An electronic countermeasures system comprising means for receiving transmitted microwave signals and feeding them to a non-heterodyning analog microwave frequency divider system having n stages, where n is an integer, each stage dividing frequencies applied to it by a factor of 2, said frequency divider system having an output feeding a processor adapted to determine if transmission of a signal from the countermeasures system is required and, if so, feeding the divided frequencies to a frequency multiplier system and techniques generator for subsequent retransmission.