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SPLIT SURFACE WAVE ACOUSTIC DELAY LINE

  • US 3,568,102 A
  • Filed: 07/06/1967
  • Issued: 03/02/1971
  • Est. Priority Date: 07/06/1967
  • Status: Expired due to Term
First Claim
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1. An acoustic surface wave device comprising in combination:

  • A layer of piezoelectric material having a smooth surface input acoustic surface wave transducer means coupled to said surface of said layer for converting electrical signals supplied thereto into an acoustic surface wave which travels along the surface of said layer in at least one predetermined first path of travel;

    a reflective grating comprising a plurality of spaced strips of metallic material coupled to said surface of said layer and positioned across and skew to said first path of travel for reflecting a portion of said acoustic surface wave along a second path on said surface skew to said first path and permitting the passage of the remaining portion of said acoustic surface wave substantially in said first path of travel along said surface; and

    output acoustic surface wave transducer means spaced from said input transducer means coupled to said surface of said layer in said second path of travel for producing an electrical output signal in response to passage of said reflected portion of said acoustic surface wave.

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