Bulk acoustic delay device

Details Bulk acoustic delay device Bulk acoustic delay device

1977-05-02

1978-07-04

Willis, Davis L.

Wave transmission lines and networks

Coupling networks

With impedance matching

310366, 333 72, H03H 926, H03H 930, H01L 4104

Patent

active

040991474

ABSTRACT:
A bulk acoustic delay device incorporating a transmitting transducer, a substrate, and two receiving transducers is described which may reduce the amplitude of undesired received reflected bulk acoustic waves by positioning one of the two receiving transducers to receive only the reflected wave having a longer acoustic path length due to wave diffraction to provide an output signal having a normal delayed signal and an attenuated triple or quadruple transit echo signal due to destructive interference. An alternate embodiment utilizes one composite receiving transducer.

REFERENCES:
patent: 3582834 (1971-06-01), Evans
patent: 3942139 (1976-03-01), Cooper et al.

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