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US 6,661,315 B2Granted
Resonator, filter, oscillator, duplexer, and communication apparatus
AssigneeMurata Manufactuing Co. Ltd
InventorKenichi Iio
Life of this patent
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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.
Claims18
A resonator comprising:
- an electrode, in which a slot-shaped opening is defined, said electrode being formed on a dielectric substrate;
- and
- electrode patterns formed in at least part of said slot-shaped opening so that said slot-shaped opening is divided into smaller-width slot lines, said electrode patterns having a width effective to suppress an edge effect between said electrode patterns,
- wherein a direction of a current flowing along one edge of each of said electrode patterns is opposite to a direction of a current flowing along an opposite edge thereof.
1 more element
Dependencies are inferred from the claim text.