Surface acoustic wave bandpass filter including unique V-shaped

Details Surface acoustic wave bandpass filter including unique V-shaped Surface acoustic wave bandpass filter including unique V-shaped

1994-12-20

1995-11-28

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313C, H03H 964

Patent

active

054711797

ABSTRACT:
A surface acoustic wave bandpass filter has a piezoelectric substrate for propagation of electroacoustic waves, an input apodized electroacoustic transducer on a surface of the substrate having a tilted apodization structure, an output unapodized electroacoustic transducer spaced from said apodized transducer on the substrate surface and a phase compensator and a shield, which are metal film areas disposed on the surface of the substrate between the apodized and unapodized transducers. The apodized transducer has first and second V-shaped summing bus bars each consisting of a first part arranged in parallel to the direction of propagation of acoustic waves and a second part aligned at an angle .PSI. with respect to the first part, the second bus bar being disposed symmetricaly to the first bus bar relative to the tilted apodization structure.

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Rechitsky, V. I., "Acoustoelectronic Radio Components Circuits, Topology Design", 1987, pp. 36-37.
Vigil, A. J. et al., "A Study of the Effects of Apodized . . . ", 1987, Electronics.
Symposium, 1987 IEEE, pp. 139-140.

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