Saw resonator having transverse mode ripple at antiresonance poi

Details Saw resonator having transverse mode ripple at antiresonance poi Saw resonator having transverse mode ripple at antiresonance poi

1996-03-01

1998-01-13

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313C, H03H 964

Patent

active

057084033

ABSTRACT:
A SAW resonator for forming a frequency trap has a surface wave substrate and at least one interdigital transducer located on the surface wave substrate. The interdigital transducer includes a pair of comb-shaped electrodes each having a plurality of electrode fingers arranged so that the pair of comb-shaped electrodes interdigitates with each other. An overlapping width of the electrode fingers of the interdigital transducer is set such that in an impedance-frequency characteristic a transverse mode ripple occurring between a resonance point and an antiresonance point is located at the antiresonance point.

REFERENCES:
patent: 5204575 (1993-04-01), Kanda et al.
patent: 5260913 (1993-11-01), Kadota et al.
patent: 5471178 (1995-11-01), Hickernell

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