SAW filter

Details SAW filter SAW filter

2006-04-25

2006-04-25

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S133000, C310S31300R

Reexamination Certificate

active

07034638

ABSTRACT:
A ladder SAW (surface acoustic wave) filter which includes a first SAW resonator disposed in a parallel arm and a second SAW resonator disposed in a series arm, has an inductor connected parallel to at least one of the first SAW resonator and the second SAW resonator. The frequency of a resonance point or an anti-resonance point of the at least one of the first SAW resonator and the second SAW resonator is adjusted by changing the inductance value of the inductor.

REFERENCES:
patent: 5559481 (1996-09-01), Satoh et al.
patent: 5933062 (1999-08-01), Kommrusch
patent: 2004/0119561 (2004-06-01), Omote
patent: 2004/0140866 (2004-07-01), Taniguchi
patent: 0 541 284 (1992-10-01), None
patent: 5-183380 (1993-07-01), None
patent: 10-65490 (1998-06-01), None

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