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Inductively coupled SAW device and method for making the same

  • US 5,095,240 A
  • Filed: 11/13/1989
  • Issued: 03/10/1992
  • Est. Priority Date: 11/13/1989
  • Status: Expired due to Term
First Claim
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1. A surface acoustic wave (SAW) device comprising:

  • (a) a SAW substrate having an exposed surface;

    (b) at least one SAW transducer, disposed on said surface of said substrate, for converting between electrical energy and SAW energy that traverses said surface along at least one acoustic path, said transducer having first and second electrical terminals;

    (c) a first conductive, planar loop disposed on said surface of said substrate and electrically connected at its ends to said first and second terminals; and

    (d) a second conductive, planer loop disposed in substantially plane parallel relationship with said first loop, said second loop having third and fourth electrical terminals, said first and second loops forming an inductive element for coupling energy into and out of said SAW device between said third and fourth terminals, on one hand, and said first and second terminals, on the other.

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