Surface acoustic wave filter

Details Surface acoustic wave filter Surface acoustic wave filter

1978-05-31

1980-05-13

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313, 333196, H03H 904, H03H 926, H03H 932, H01L 4110

Patent

active

042030820

ABSTRACT:
To obtain low insertion loss and low TTE level, a first central transducer, a second transducer and a third transducer are disposed on one surface of a piezoelectric substrate in such a manner that the second and the third transducers are in the direction of propagation (X-direction) of surface acoustic waves launched by the first transducer and the distance between center lines of the first and the second transducers and also the distance between the center lines of the first and the third transducers vary along the Y-direction perpendicular to the X-direction.

REFERENCES:
patent: 4016513 (1977-04-01), Solie
patent: 4028649 (1977-06-01), Komatsu et al.
Wauk-"Suppression of Spurious Triple-Transit Signals in Acoustic Surface-Wave Delay Lines", in Appl. Phys. Lett., vol. 20, No. 12, Jun. 15, 1972; pp. 481-483.

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