Surface acoustic wave resonator incorporating coupling transduce

Details Surface acoustic wave resonator incorporating coupling transduce Surface acoustic wave resonator incorporating coupling transduce

1976-09-29

1979-03-13

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333153, 333195, H03H 902, H03H 926, H03H 932, H03H 904

Patent

active

041445074

ABSTRACT:
Acoustic surface wave resonator structure in which coupling transducers are incorporated within reflecting arrays. Heretofore, acoustic surface wave resonator devices have included one or more interdigital transducers disposed in the resonant cavity between spaced arrays of reflectors in order to couple energy in and out of the device at resonance. The device disclosed incorporates the interdigital transducers into the reflector arrays themselves, rather than placing the transducers in the resonant cavity, thus allowing a total cavity size less than the total size of the transducers. The electrodes of the interdigital transducers incorporated into the reflector arrays are so arranged as to make these electrodes a periodic extension of the array.

REFERENCES:
patent: 3886504 (1975-05-01), Hartmann et al.
patent: 3961293 (1976-06-01), Hartmann et al.
patent: 3970970 (1976-07-01), Worley
patent: 4013983 (1977-03-01), Hartemann
patent: 4054851 (1977-10-01), Borner et al.

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