Acoustic wave devices

Details Acoustic wave devices Acoustic wave devices

1978-03-31

1980-05-20

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313, 333147, 333196, H03H 902, H03H 926, H03H 932

Patent

active

042041783

ABSTRACT:
An acoustic surface wave device employs a substrate structurally orientated to enhance the propagation of acoustic surface skimming bulk waves. Multiple reflections from opposed end faces of the substrate establish an acoustic surface skimming bulk standing wave at a predetermined frequency. An interdigital transducer couples to the standing wave. A plurality of devices may be intercoupled to provide a bandpass filter.

REFERENCES:
patent: 3760204 (1973-09-01), Yester, Jr.
patent: 3886504 (1975-05-01), Hartmann et al.
patent: 3950713 (1976-04-01), Lewis
patent: 4056793 (1977-11-01), Wagers et al.
Browning et al., "New Family of Bulk Acoustic Wave Devices Employing Interdigital Transducers," in Electronics Letters, Mar. 3, 1977, vol. 13, No. 5, pp. 128-130.
Suzuki et al., "Some Studies on Saw Resonators and Multiple-Mode Filters," in 1976 Ultrasonic Symposium Proceedings, IEEE Cat. #76, CH1120-5SU, pp. 297-302.

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