Group-arranged type surface acoustic wave transducer

Details Group-arranged type surface acoustic wave transducer Group-arranged type surface acoustic wave transducer

1981-12-15

1984-01-31

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313R, 333151, 333195, H03H 902, H01L 4100

Patent

active

044292465

ABSTRACT:
A group-arranged type unidirectional surface acoustic wave transducer, which includes, in combination, groups of interdigital electrodes wherein the center-to-center distance between the electrodes is made equal to an integral number of wavelengths plus a quarter wavelength and further groups of interdigital electrodes wherein the center-to-center distance between the electrodes is made equal to an integral number of wavelengths plus three quarter wavelengths. According to the present invention, there is also provided a unidirectional surface acoustic wave device which can be employed as a filter by changing the frequency-amplitude characteristic of the surface acoustic wave.

REFERENCES:
patent: 3727155 (1973-04-01), Devries
patent: 3866154 (1975-12-01), Moore

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