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US 2003/0076201 A1Published application
Dual-mode band-pass filter
AssigneeMurata Manufacturing Co., Ltd.
InventorsNaoki Mizoguchi, Hisatake Okamura, Seiji Kamba
Life of this patent
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Abstract
A dual-mode band-pass filter having a greatly reduced size and a high design flexibility, includes a frame-shaped electrode pattern disposed on one surface or inside a dielectric substrate. A pair of input-output circuits are coupled to the frame-shaped electrode pattern. The plane shape and the line-width of the frame-shaped electrode pattern are configured so that two generated resonance modes are coupled to each other.
Claims20
A dual-mode band-pass filter comprising:
- a dielectric substrate;
- an electrode pattern disposed on one main surface of the dielectric substrate or inside the dielectric substrate, said electrode pattern including a line-shaped electrode having a substantially constant line-width from a starting point to an end point thereof;
- a ground electrode disposed inside the dielectric substrate or on a main surface of the dielectric substrate so as to be opposed to the electrode pattern via a portion of the dielectric substrate;
- input-output coupling circuit electrodes coupled to the electrode pattern;
- and
- at least one of a capacitance loading portion and an inductance loading portion is disposed in a portion of the line-shaped electrode so that two resonance modes having different resonance frequencies and being generated at the electrode pattern are coupled to each other.
3 more elements
A dual-mode band-pass filter comprising:
- a dielectric substrate;
- an electrode pattern disposed on one main surface of the dielectric substrate or inside the dielectric substrate;
- a ground electrode disposed inside the dielectric substrate or on a main surface of the dielectric substrate so as to be opposed to the electrode pattern via a portion of the dielectric substrate;
- input-output coupling circuit electrodes coupled to the electrode pattern;
- wherein
- a plane shape and a line-width of the electrode pattern are arranged such that two resonance modes having different resonance frequencies and being generated at the electrode pattern are coupled to each other.
3 more elements
Dependencies are inferred from the claim text.