Acoustic surface wave device

Details Acoustic surface wave device Acoustic surface wave device

1983-12-23

1985-05-07

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313D, 333151, 333153, 333195, H03H 964, H03H 9145

Patent

active

045160945

ABSTRACT:
An acoustic surface wave device having a pair of attenuating transducers positioned between the input transducer and the output transducer. Each attenuating transducer has two sets of interleaved electrodes which are connected together by a thin film resistor. The attenuating transducers are spaced apart so that their reflected signals are 180.degree. out of phase, and thus tend to cancel each other. The attenuating transducer arrangement increases the insertion loss of the device and consequently suppresses triple transit signals in the device.

REFERENCES:
patent: 4196407 (1980-04-01), Masaie et al.
patent: 4258342 (1981-03-01), Miyajima et al.

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