Surface acoustic wave filter with stacked impedance matching coi

Details Surface acoustic wave filter with stacked impedance matching coi Surface acoustic wave filter with stacked impedance matching coi

1999-03-18

2000-09-19

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313R, 310313B, H03H 964

Patent

active

061218596

ABSTRACT:
A surface acoustic wave filter is formed by arranging electrode portions, each obtained by interdigitally forming a pair of comb electrodes on a piezoelectric substrate to oppose each other at a predetermined distance, on input and output sides, respectively. Each electrode portion includes an impedance matching circuit.

REFERENCES:
patent: 4297660 (1981-10-01), Ieki et al.
patent: 4409567 (1983-10-01), Setsune et al.
patent: 4625184 (1986-11-01), Niitsuma et al.
patent: 5581141 (1996-12-01), Yamada et al.
patent: 5619175 (1997-04-01), Bauregger
patent: 5699026 (1997-12-01), Kurp et al.

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