Filter and composite filter, filter assembly, integrated...

Details Filter and composite filter, filter assembly, integrated... Filter and composite filter, filter assembly, integrated...

2003-09-17

2008-03-25

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S187000, C333S189000, C333S188000

Reexamination Certificate

active

07348867

ABSTRACT:
A dual-mode acoustic wave resonator (7a) having a resonance mode inter-coupler (6) is disposed across narrow voids (4, 5) from an input electrode (2) and an output electrode (3). They are supported for vibrations on a substrate by conductive posts (27, 28, 29) and a power supply pad (3). Opposing electrodes (10, 11, 21, 23) are formed below the input and output electrodes (2, 3), resonator (7a), and resonance mode inter-coupler (6) across narrow gaps. As a voltage of a power supply (25) is changed, a distortion of the resonator (7a) changes due to an electrostatic force, causing a change in the center resonance frequency. As voltages of power supplies (16, 17) are changed, distortions of the input and output electrodes (2, 3) change to cause a change in the opposing areas of end faces of the input and output electrodes to the resonator (7a). This causes a change in the situation of exchanging energy between the input and output electrodes and the resonator (7a) to change the external Q-value. As the voltage of the power supply (25) is changed, a distortion of the inter-coupler (6) changes to cause a change in the coupling coefficient between the resonance modes.

REFERENCES:
patent: 5640133 (1997-06-01), MacDonald et al.
patent: 5955932 (1999-09-01), Nguyen et al.
patent: 5976994 (1999-11-01), Nguyen et al.
patent: 6249073 (2001-06-01), Nguyen et al.
patent: 7095295 (2006-08-01), Stalford et al.
patent: 05-251977 (1993-09-01), None
patent: 06-006174 (1994-01-01), None
patent: 2001-094062 (2001-04-01), None
patent: 2001-203556 (2001-07-01), None
Frank D. Bannon, III, et al.; “High-Q HF Microelectromechanical Filters”; IEEE Journal of Solid-State Circuits; vol. 35(4); Apr. 2000; pp. 512-526.

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