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Microwave switched amplifier/multiplier

  • US 4,401,952 A
  • Filed: 07/20/1981
  • Issued: 08/30/1983
  • Est. Priority Date: 07/20/1981
  • Status: Expired due to Fees
First Claim
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1. A microwave signal amplifying and multiplying apparatus capable of substantially continuous tuning over a first frequency range which is greater than a first tunable frequency range of a continuously tunable microwave frequency oscillator, said apparatus comprising:

  • input matching means for coupling to a single microwave frequency oscillator;

    a solid-state microwave frequency amplifying element having a first gate electrode, a drain electrode and a source electrode, said amplifying element being operable at a first bias level over said first microwave frequency range as a signal amplifier and at least a second bias level as a signal amplifier and multiplier over harmonics of said first frequency range;

    a plurality of signal channel means, each signal channel means having a signal input terminal coupled to a signal output terminal in common with other signal channel means, each said signal channel means comprising;

    (a) a first diode having a first electrode and a second electrode, said first electrode being DC coupled to said drain electrode through said input terminal and said second electrode being DC coupled to a bias terminal;

    (b) a microwave frequency output matching network coupled to receive microwave signals through said first diode, said matching network being specific to a selected range of frequency different from ranges of frequency of other ones of said signal channel means; and

    (c) a second diode coupled to receive microwave signals through said output matching network and having a first electrode and a second electrode, said first electrode thereof being coupled to said common output terminal and said second electrode thereof being DC coupled to a bias means;

    first bias means for selectively forward and reverse biasing each one of said first diodes;

    second bias means for selectively forward and reverse biasing each one of said second diodes;

    said amplifying element being coupled in a common source configuration with said source electrode coupled to ground and wherein said first bias means is operative to provide forward bias to said first diode and to preselect a desired operating region of said amplifying element, said first and second bias means being switchable in concert to couple and uncouple said amplifying element through a selected one of said plurality of signal channel means to said common output.

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