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Direct three-wire to stripline connection

  • US 5,689,216 A
  • Filed: 04/01/1996
  • Issued: 11/18/1997
  • Est. Priority Date: 04/01/1996
  • Status: Expired due to Term
First Claim
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1. A microwave circuit comprising:

  • a dielectric substrate;

    a stripline transmission line buried in said dielectric substrate below a surface of the substrate, said stripline transmission line comprising a stripline conductor strip, an electrically conductive lower ground plane, and an electrically conductive upper ground plane buried in said substrate between said stripline conductor strip and said substrate surface;

    a three-wire transmission line connected to and extending transversely to said stripline transmission line and extending through said substrate between said stripline transmission line and said substrate surface, said three-wire line consisting of a first conductor wire connected to said stripline conductor strip, a second conductor wire connected to said upper and lower stripline ground planes and a third conductor wire connected to said upper and lower stripline ground planes; and

    wherein said upper ground plane has an open area formed therein to allow said first wire to extend through a plane defined by the upper ground plane without contacting the upper ground plane.

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