Piezoelectric resonator filter

Details Piezoelectric resonator filter Piezoelectric resonator filter

2007-11-27

2007-11-27

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S189000, C333S193000

Reexamination Certificate

active

10543837

ABSTRACT:
A piezoelectric resonator filter for allowing a high-frequency signal in a desired frequency band to pass therethrough. The piezoelectric resonator filter presents a low insertion loss while securing satisfactory characteristics in a stop band. The piezoelectric resonator includes two or more reactance elements in serial connection between input and output terminals, at least three or more piezoelectric resonators in parallel connection between the input and output terminals, and an inductor having a grounded end. The reactive elements and resonators of the piezoelectric resonator are arranged in a ladder connection. Among the three or more piezoelectric resonators, only those piezoelectric resonators which do not adjoin each other are connected in common to the inductor.

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K. M. Lakin ED, “Thin Film Resonator Technology”, Institute of Electrical and Electronics Engineers: Proceedings of the 2003 IEEE International Frequency Control Cymposium & PDA Exhibition Jointly With the 17th, European Frequency and Time Forum, Tampa, FL, May 4-8, 2003, pp. 765-778, XP010688892, ISBN: 0-7803-7688-9.

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