Acoustic surface-wave filter

Details Acoustic surface-wave filter Acoustic surface-wave filter

1974-12-17

1977-10-18

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310313, 330 55, 333 30R, H03H 902, H03H 926, H03H 930, H03H 932, 330

Patent

active

040548511

ABSTRACT:
An acoustic surface-wave filter comprises an element which is excitable to perform surface oscillations, which is formed at least partly of piezoelectric material and has interference locations for the surface wave on its surface together with electromechanical converter means, at least some of the interference locations forming a resonator with the average spacing of the interference locations being equal to a half of the wavelength of the surface waves or a whole number multiple of a half of the wavelength of the surface waves.

REFERENCES:
patent: 3568102 (1971-03-01), Tseng
patent: 3662293 (1972-05-01), De Vries
patent: 3781717 (1973-12-01), Kuenemund
patent: 3886504 (1975-05-01), Hartmann et al.

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