Resonator, filter, oscillator, duplexer, and communication...

Details Resonator, filter, oscillator, duplexer, and communication... Resonator, filter, oscillator, duplexer, and communication...

2005-06-21

2005-06-21

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Resonators

C333S134000, C333S202000

Reexamination Certificate

active

06909343

ABSTRACT:
A resonator, a filter, an oscillator, a duplexer, and a communication apparatus employing these devices have improved efficiency characteristics in confining an electromagnetic field in an opening of an electrode, suppressed current concentration, and minimized conductor loss. Electrode patterns are formed near short-circuited positions in a slot so that the slot will be divided into smaller-width slot lines. Consequently, the efficiency in confining the electromagnetic field is improved, and conductor loss is minimized.

REFERENCES:
patent: 6121855 (2000-09-01), Hiratsuka et al.
patent: 6531934 (2003-03-01), Mikami et al.
patent: 09246821 (1997-09-01), None
Konji Wada, et al., CPW/Slotline Bandpass Filters with a Low Spurious Response, Proceedings of the European Microwave Conference, GB, Swanley, Nexus Media, vol. CONF 26, Sep. 9-12, 1996, pp. 422 to 426.
Patent Abstract of Japan vol. 014, No. 297; Jun. 27, 1990 & JP 02 096402 A (Matsushita Electric Ind Co Ltd), Apr. 9, 1990.

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