Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2006-11-21
2006-11-21
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C310S328000
Reexamination Certificate
active
07138889
ABSTRACT:
A single port multi-resonator acoustic resonator device (200, 300, 400, 490) possesses an input impedance that exhibits precisely designed electrical resonances. The device contains at least three parts: a transducer/resonator (201, 301, 401. 491) used both to interface to an external electrical circuit and to transform electrical energy into mechanical (i.e. acoustic) vibrations (and vice versa), and also function as a resonator; a mechanical (i.e. acoustic) resonator (203, 303, 460, 480) and an acoustic coupler (202, 302, 404, 494) that controls the acoustic interaction between the transducer/resonator and the mechanical resonator.
REFERENCES:
patent: 6720844 (2004-04-01), Lakin
patent: 6917261 (2005-07-01), Unterberger
patent: 6927651 (2005-08-01), Larson et al.
patent: 6963257 (2005-11-01), Ella et al.
K.M. Lakin; “Bulk Acoustic Wave Coupled Resonator Filters”; 2002 IEEE Frequency Control Symposium and PDA Exhibition; May 29-31, 2002, pp. 8-14.
G.G. Fattinger et al.; “Coupled Bulk Acoustic Wave Resonator Filters: Key Technology for Single-to-Balanced RF Filters” ;2004 IEEE Microwave Symposium Digest MTT-S International; Jun. 6-11, 2004, vol. 2, pp. 927-929.
Roth & Goldman
Summons Barbara
TriQuint Semiconductor Inc.
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