Abstract 1. A microwave fuze system for a missile including a firing circuit having means for discriminating between a target and a countermeasure reflector, comprising in combination, a frequency modulated transmitter, an antenna coupled to said transmitter and radiating a signal polarized in a predetermined direction, a pair of receiving antennas including one antenna polarized in the same direction as said transmitting antenna and one antenna polarized in a direction normal to said transmitting antenna, a first switch means coupled to said receiving antennas and adapted to alternately connected said receiving antennas to a mixing means whereby the received signals are mixed with a portion of the transmitted signal, means for amplifying a band of said mixed transmitted and received signals, a pair of envelope detector means connected to said amplifying means by a second switch means, a difference amplifier adapted to receive the output from said pair of envelope detector for coupling a firing signal to said firing circuit when the energy level of the output of a certain one of said detectors exceeds the energy level of the other detector output, and a periodic wave control means actuating said first and second switch means whereby said pair of receiving antennas and said pair of envelope detectors are synchronously connected to said mixing means and said amplifying means respectively.
A microwave fuze system for a missile including a firing circuit having means for discriminating between a target and a countermeasure reflector, comprising in combination, a frequency modulated transmitter, an antenna coupled to said transmitter and radiating a signal polarized in a predetermined direction, a pair of receiving antennas including one antenna polarized in the same direction as said transmitting antenna and one antenna polarized in a direction normal to said transmitting antenna, a first switch means coupled to said receiving antennas and adapted to alternately connected said receiving antennas to a mixing means whereby the received signals are mixed with a portion of the transmitted signal, means for amplifying a band of said mixed transmitted and received signals, a pair of envelope detector means connected to said amplifying means by a second switch means, a difference amplifier adapted to receive the output from said pair of envelope detector for coupling a firing signal to said firing circuit when the energy level of the output of a certain one of said detectors exceeds the energy level of the other detector output, and a periOdic wave control means actuating said first and second switch means whereby saidpair of receiving antennas and said pair of envelope detectors are synchronously connected to said mixing means and said amplifying means respectively.
Claim 2
Dependent Claim
217 words
A microwave fuze system for a missile including a firing circuit having means for discriminating between a target and a countermeasure reflector, comprising in combination, a frequency modulated transmitter, an antenna coupled to said transmitter and radiating a signal polarized in a predetermined direction, a pair of receiving antennas including one antenna polarized in the same direction as said transmitting antenna and one antenna polarized in a direction normal to said transmitting antenna, a first switch means coupled to said receiving antennas and adapted to alternately connected said receiving antennas to a mixing means whereby the received signals are mixed with a portion of the transmitted signal, means for amplifying a band of said mixed transmitted and received signals, a pair of envelope detector means connected to said amplifying means by a second switch means, a difference amplifier adapted to receive the output from said pair of envelope detector for coupling a firing signal to said firing circuit when the energy level of the output of a certain one of said detectors exceeds the energy level of the other detector output, and a periOdic wave control means actuating said first and second switch means whereby saidpair of receiving antennas and said pair of envelope detectors are synchronously connected to said mixing means and said amplifying means respectively.