Acoustic surface wave device

Details Acoustic surface wave device Acoustic surface wave device

1978-11-03

1980-05-27

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313, 333196, H03H 904, H03H 926, H03H 932

Patent

active

042052858

ABSTRACT:
An acoustic surface wave filter device having an input transducer of interleaved overlapping electrode structure. The portions of the inactive electrodes and the active electrodes outside the overlap envelope are combined into continuous uninterrupted metal layers. The elimination of electrode edges in the regions of the metal layers greatly reduces the problem of spurious signals caused by acoustic reflections from the edges.

REFERENCES:
patent: 4023124 (1977-05-01), Parker et al.
patent: 4144508 (1979-03-01), Lewis et al.
patent: 4158823 (1979-06-01), Kuny et al.
Tancrell et al.--"Wavefront Distortion of Acoustic Surface Waves from Apodized Interdigital Transducers" in Applied Physics Letters, vol. 19, No. 11 Dec. 1, 1971; pp. 456-459.

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