Resonator, filter, duplexer, and high-frequency circuit...

Details Resonator, filter, duplexer, and high-frequency circuit... Resonator, filter, duplexer, and high-frequency circuit...

2005-05-03

2005-05-03

Young, Brian (Department: 2819)

Wave transmission lines and networks

Resonators

Coaxial or shielded

C333S219000, C333S204000

Reexamination Certificate

active

06888426

ABSTRACT:
In a resonator having a dielectric member and an electrode formed on the dielectric member, a displacement area (D area) having a high vertical electric field component, and a short or steady area (S area) having a vertical electric field component of zero or close to zero are provided in an interface between the dielectric member and the electrode. A single-layer conductive film divided into portions is formed in the D area or on the side surfaces of the dielectric member, and a multilayer thin-film electrode is formed in the S area or on the end faces of the dielectric member. Conductive thin films of the multilayer thin-film electrode are alternately connected to the single-layer conductive film portions. In-phase currents having the same amplitude flow to the conductive thin films of the multilayer thin-film electrode in the S area in radial direction with respect to the axis of symmetry, thus achieving low-loss operation of the multilayer thin-film electrode in the S area.

REFERENCES:
patent: 5408053 (1995-04-01), Young
patent: 5804919 (1998-09-01), Jacobsen et al.
patent: 6148221 (2000-11-01), Ishikawa et al.
patent: 6556101 (2003-04-01), Tada et al.
patent: 1301055 (2001-06-01), None

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