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Transmitter-receiver module

  • US 4,541,120 A
  • Filed: 08/16/1983
  • Issued: 09/10/1985
  • Est. Priority Date: 08/19/1982
  • Status: Expired due to Fees
First Claim
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1. A transmitter-receiver module providing an IF signal when receiving, and a transmitter signal when transmitting, and including an antenna, an oscillator used as a signal source during transmitting and as a local oscillator during receiving, a coupler having four terminals one of which is connected to the oscillator, another one to the antenna, and each of the remaining two to one diode, the two diodes being used as a modulator during transmitting and as a mixer during receiving, characterized in that the oscillator, the coupler, and the mixer-modulator are implemented in fin-line form, that the fin-line oscillator contains a diode housed in a package (500) and used as an active element, and an impedance matching network for matching the diode to a load and determining the frequency, that a waveguide (100) containing the fin line is connected with a cutoff waveguide (400), that the the fin line includes fins (200) which extend into the cutoff waveguide (400) and have respective spaced ends, that the diode package (500) is disposed in the cutoff waveguide and electrically connected to one of the top and bottom sides of the cutoff waveguide, and that one of a suitable distance (l) between the fin ends and the diode package and a suitable width of a slot between the fins is chosen, as well as a suitable value of capacitance in the cutoff waveguide is chosen to determine the frequency and match the diode to the load.

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