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Acoustically coupled antenna utilizing an overmoded configuration

  • US 5,361,077 A
  • Filed: 05/29/1992
  • Issued: 11/01/1994
  • Est. Priority Date: 05/29/1992
  • Status: Expired due to Fees
First Claim
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1. An antenna utilizing an overmoded configuration for coupling energy in a predetermined frequency band between an electrical circuit and a propagating medium, the antenna including an antenna interface structure and comprising, in combination:

  • a first thin film resonator having a first pair of electrodes and a first thin film piezoelectric element interposed between the first pair of electrodes, the first thin film resonator coupled to the electrical circuit;

    a second thin film resonator having a second pair of electrodes and a second thin film piezoelectric element interposed between the second pair of electrodes, the second thin film resonator comprising an integral part of the antenna interface structure and operable for interfacing with the propagating medium; and

    a substrate formed of a non-magnetic material interposed between the first and second thin film resonators, the substrate having a thickness substantially equal to a multiple of one-half wavelength of a desired frequency in the predetermined frequency band and supporting acoustic waves with a substantially constant resonant frequency to allow coupling of acoustic energy in the predetermined frequency band between the first and second thin film resonators of the antenna.

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