Acoustically coupled antenna utilizing an overmoded configuration

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 delay element formed of a non-magnetic material interposed between the first and second thin film resonators, the delay element 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 for acoustically coupling energy in the predetermined frequency band between the first and second thin film resonators of the antenna.

An antenna utilizing an overmoded configuration for coupling energy in a predetermined frequency band between an electrical circuit and a propagating medium, the antenna 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 operable for interfacing between the antenna and the propagating medium;
• and
• a delay element interposed between the first and second thin film resonators, the delay element having a thickness substantially equal to a multiple of one-half wavelength plus one-quarter wavelength of a desired frequency in the predetermined frequency band so that the delay element functions as an impedance inverter and facilitates acoustical coupling of energy in the predetermined frequency band between the first and second thin film resonators.

An antenna utilizing an overmoded configuration for coupling energy in a predetermined frequency band between an electrical circuit and a propagating medium, the antenna 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 operable for interfacing between the antenna and the propagating medium;
• and
• a substrate interposed between the first and second thin film resonators having a thickness substantially equal to a multiple of one-half wavelength of a desired frequency plus one-quarter wavelength of the desired frequency in the predetermined frequency band to allow coupling of acoustic energy between the first and second thin film resonators, the substrate also serving as an impedance invertor.

An antenna utilizing an overmoded configuration for coupling energy in a predetermined frequency band between an electrical circuit and a propagating medium, the antenna 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 operable for interfacing between the antenna and the propagating medium;
• and
• a delay element interposed between the first and second thin film resonators, the delay element providing acoustical impedance matching to facilitate acoustic energy transfer in the predetermined frequency band between the first and second thin film resonators.

An antenna utilizing an overmoded configuration for coupling energy in a predetermined frequency band between an electrical circuit and a propagating medium, the antenna 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 operable for interfacing between the antenna and the propagating medium;
• and
• a substrate interposed between the first and second thin film resonators, the substrate providing acoustical impedance matching to facilitate acoustic energy transfer in the predetermined frequency band between the first and second thin film resonators.