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Switching mixer

  • US 4,492,960 A
  • Filed: 01/18/1982
  • Issued: 01/08/1985
  • Est. Priority Date: 01/18/1982
  • Status: Expired due to Fees
First Claim
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1. A switching mixer comprising:

  • a local oscillator having an input and an output;

    first filter means connected to said local oscillator output for passing RF signals and signals from said local oscillator and for blocking intermediate frequency signals and having an input and an output;

    a hybrid coupler having a first port connected to said output of said first filter means and also having second, third and fourth ports;

    first and second impedance matching networks each having a first terminal connected respectively to said hybrid coupler second and third ports and each said impedance matching network having a second terminal;

    first and second mixer diodes, each being connected to a respective second terminal of one of said first and second impedance matching networks;

    diode bias network means connected to said first and second mixer diodes for variably adjusting the amount of bias to said first and second mixer diodes;

    second filter means connected to said hybrid coupler for passing intermediate frequency signals; and

    third filter means connected to said hybrid coupler fourth port for passing RF signals and signals from said local oscillator and for blocking intermediate frequency signals.

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