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Structure of reception frequency converting portion in a multi-band microwave detector

  • US 5,341,138 A
  • Filed: 03/17/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 03/24/1992
  • Status: Expired due to Fees
First Claim
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1. A structure of a reception frequency converting portion of a multi-band microwave detector, and including a microwave circuit comprising:

  • a horn antenna;

    two-port cavity integrally formed with said horn antenna and having one port communicated with a throat portion of said horn antenna;

    one-port cavity integrally formed with said two-port cavity and communicated with the other port of said two-port cavity;

    ;

    a mixer diode located at said throat portion of said horn antenna;

    a first local oscillator provided within said two-port cavity; and

    a second local oscillator provided within said one-port cavity.

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