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Microstrip transformer apparatus

  • US 5,262,740 A
  • Filed: 04/09/1992
  • Issued: 11/16/1993
  • Est. Priority Date: 04/09/1992
  • Status: Expired due to Term
First Claim
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1. A planar transmission line structure comprising:

  • a substrate;

    a first serpentine transmission line located on a top surface of said substrate;

    a second serpentine transmission line intertwined with and crossing said first line at given points with said second line electrically isolated from said first line at said points of crossing;

    at least a third transmission line intertwined with said first and second lines and physically crossing said lines and isolated therefrom at said crossings;

    isolation means located at said points of crossing between said lines to physically isolate said lines from one another at each of said points of crossing;

    terminal means coupled to said first and second lines adapted to enable said lines to receive an RF signal; and

    means coupled to said first, second and third lines to provide a trifilar transformer operation.

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