Diplexer and multiplexer using the same
AssigneeNgk Spark Plug Co., Ltd.
InventorsSyouji Ono, Tetsuo Suehiro, Jyunichi Ichikawa, Keiji Takagi, Manabu Sato
Life of this patent
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Abstract
A diplexer provides a high degree of design freedom for satisfying the requirements of electric characteristics so as to realize desired characteristics and at the same time can be downsized and a multiplexer is realized by using such a diplexer. The diplexer includes a filter having a first pass band and a filter having a second pass band with a frequency band at least twice as high as the frequency band of the first pass band, the filter having the first pass band being a filter of the lumped constant type, the filter having the second pass band being a filter of the distributed constant type.
Claims11
A diplexer comprising:
- a first filter having a first pass band;
- and
- a second filter having a second pass band with a center frequency at least twice as high as the center frequency of the first pass band;
- wherein
- the first filter is a filter of a lumped constant type;
- wherein the second filter is a band pass filter of a distributed constant type and comprises a resonator formed in a multilayer substrate that includes an inductor made of a linked via conductor formed along a laminating direction of the multilayer substrate and an electrode capacitive-coupled to a grounding electrode;
- and
- wherein the resonator of the second filter includes an inductor electrode having a bent section.
A diplexer comprising:
- a first filter having a first pass band;
- and
- a second filter having a second pass band with a center frequency at least twice as high as the center frequency of the first pass band;
- wherein
- the first filter is a filter of a lumped constant type;
- wherein the second filter is a band pass filter of a distributed constant type and comprises a resonator formed in a multilayer substrate that includes an inductor made of a linked via conductor formed along a laminating direction of the multilayer substrate and an electrode capacitive-coupled to a grounding electrode;
- and
- wherein the second filter of the distributed constant type having the second pass band is connected to a common terminal by way of an LC parallel resonance circuit.
A diplexer comprising:
- a first filter having a first pass band;
- and
- a second filter having a second pass band with a center frequency at least twice as high as the center frequency of the first pass band;
- wherein
- the first filter is a filter of a lumped constant type;
- wherein the second filter is a band pass filter of a distributed constant type and comprises a resonator formed in a multilayer substrate that includes an inductor made of a linked via conductor formed along a laminating direction of the multilayer substrate and an electrode capacitive-coupled to a grounding electrode;
- and
- wherein the resonator of the second filter of the distributed constant type having the second pass band is connected to a short circuit terminal formed at a side of the surface located vis-à-vis a mounting surface of the multilayer substrate.
Dependencies are inferred from the claim text.