Acoustic periodic structure

Details Acoustic periodic structure Acoustic periodic structure

1977-11-09

1979-04-17

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313, 331107A, 333150, H03H 904, H03H 920, H03H 932, H03B 532

Patent

active

041503465

ABSTRACT:
An acoustic periodic structure for slow wave propagation and filtering having a corrugated surface with traction-free boundaries which can support a horizontally polarized shear surface wave that travels much slower than the bulk shear wave velocity and that exhibits an upper cut-off frequency. Electrodes are located on the tops of the teeth forming the corrugated surface and alternate electrodes are excited out of phase, the distribution of the excitation voltage phases determining the particular mode of resonance.

REFERENCES:
patent: 3862431 (1975-01-01), Quate et al.
Auld et al. --"Horizontal Shear Surface Waves on Corrugated Surfaces" in ctronics Letters, 25 Nov. 1976, vol. 12, No. 24; pp. 650-652.

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