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Tunable microwave filtering device with dielectric resonator, and applications

  • US 4,835,498 A
  • Filed: 06/06/1988
  • Issued: 05/30/1989
  • Est. Priority Date: 06/09/1987
  • Status: Expired due to Fees
First Claim
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1. A tunable microwave filtering device comprising:

  • a first microstrip line comprising a ground plate;

    a dielectric resonator coupled to said microstrip line;

    an active element coupled to said dielectic resonator, the variable impedance of said active element enabling the frequency tuning of the device;

    a coplanar line cut up in said ground plate and coupled to said resonator, the active element being mounted on said coplanar line.

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