Patent ID: 6727840
Filing Date: 2004-04-27
Classification: G01S

Abstract:
An electronic support measure (ESM) system providing interference suppression and having a constant beamwidth lens (CBL) antenna receiving incoming RF signals and providing a plurality of output signals, said ESM system comprising:a) a log video amplifier receiver having multiple channels with each channel receiving a respective one of said plurality of output signals of said CBL antenna each channel of, said log video amplifier receiver comprising a first mixer having first and second inputs and an output and with the first input receiving a signal representative of said respectively output signal of said CBL antenna, said output of said first mixer connected to a logarithmic amplifier which provides an output video signal comprising the output signal of the respective channel of said log video amplifier receiver; b) an omnidirectional antenna receiving said incoming RF signals and providing a representative output thereof; c) a notch filter receiving said output signal of said omnidirectional antenna and providing a filtered output thereof; d) a wide band receiver receiving said output of said notch filter and providing first and second outputs each representative of said output of said notch filter; e) an oscillator having a predetermined frequency and providing an output signal; f) a second mixer having first and second inputs and an output and with the first input receiving the first output of said wide band receiver and the second input receiving the output of said oscillator, said output of said second mixer connected to said second input of each of said first mixers; g) a digitizer/angle encoder connected to receive each of the output signals of each of the channels of said log video amplifier receiver, said digitizer/angle encoder providing output quantities representative of the amplitude, pulse width and time of arrival (TOA) of said RF signal and direction finding (D/F) data; and h) a system digital processor connected to receive said output quantities of said digitizer/angle encoder and said second output of said wide band receiver.