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RECEIVER FOR USE WITH A DIRECTION FINDING OR RADAR RECEIVING SYSTEM

  • US 3,686,670 A
  • Filed: 03/19/1970
  • Issued: 08/22/1972
  • Est. Priority Date: 03/28/1969
  • Status: Expired due to Term
First Claim
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1. A receiver for use with a system having a directional aerial array comprising at least two aerials the receiver having means to accept signals received by the aerial array and to produce an output in response thereto, the output indicating the direction of the source of said signals relative to the aerial array, the receiver comprising processor means to derive from the signals received by each aerial of the array respective trains of pulses, the pulses of each train being in a predetermined phase relationship with the carrier waveform of the respective received signal, means to produce said output as a function of the time difference between the occurrence of pulses in one train and the occurrence of pulses in at least one other said train the output having a maximum amplitude when the time difference tends to zero, and superheterodyne mixer means having a common heterodyne oscillator for mixing the received signals accepted from each aerial, the superheterodyne mixer means substantially reducing the frequency of the carrier waveform of the received signals without changing the phase difference therebetween.

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