Longitudinally coupling acoustic surface wave double mode filter

Details Longitudinally coupling acoustic surface wave double mode filter Longitudinally coupling acoustic surface wave double mode filter

1996-08-30

1998-11-17

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333194, 310313B, H03H 964

Patent

active

058382178

ABSTRACT:
A double-mode SAW filter of a longitudinally coupling type utilizing an SH-type surface wave, which is structured with first and second IDTs formed on said piezoelectric substrate to cause reflection of an SH-type surface wave between opposite two end faces, thereby creating a standing wave.

REFERENCES:
patent: 4204178 (1980-05-01), Mitchell
patent: 5184042 (1993-02-01), Kadota et al.
"Ceramic Resonators Using BGS Waves"; Michio Kadota, Kazuhiko Morozumi, Toshiaki Ikeda and Toru Kasanami; Proceedings of 12th Symposium on Ultrasonic Electronics, Tokyo 1991 Japanese Journal of Applied Physics, vol. 31 (1992) Supplement 31-1, pp. 219-221.

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