Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1981-11-16
1983-10-11
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
310313A, 333154, 333155, 333195, H03H 964, H03H 942, H03H 925, H03H 954
Patent
active
044095708
ABSTRACT:
A separated substrate acoustic wave device having an active piezoelectric substrate and a separate base substrate. Input and output transducers are mounted upon the base substrate. The active substrate, which includes grooved-array reflectors in the case of resonators, is mounted opposite the base substrate so that it does not contact the transducer electrodes and further so that electric fringing fields generated in the transducers will induce an acoustic wave due to the piezoelectric effect in the active substrate. Similarly, acoustic waves propagating in the active piezoelectric substrate will have an associated electric field which induces an electrical signal in the transducer permitting detection of the acoustic waves propagating in the active substrate.
REFERENCES:
patent: 3961293 (1976-06-01), Hartmann et al.
patent: 4290033 (1981-09-01), Kagiwada et al.
patent: 4330728 (1982-05-01), Solie
patent: 4349794 (1982-09-01), Kagiwada et al.
Bond et al-"Surface Acoustic Wave Probing with Spaced Interdigital Transducers", Review Scientific Instruments, vol. 48, No. 6, Jun. 1977; pp. 682-687.
Nussbaum Marvin L.
Sperry Corporation
Terry Howard P.
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