Patent EP0414619A2 successfully refreshed from Google Patents.
EP0414619A2
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EP
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Method of adjusting a frequency response in a three-conductor type filter device
Assignee: Niterra Co Ltd
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Filing: 1990-06-18
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Granted: —
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Expires: 2010-06-18
Abstract
Abstract A method of adjusting a frequency response in a filter device (10) of a three-conductor type having a pair of stacked dielectric substrates (11,12) with a plurality of strip-line resonator conductors (15,16,17) being sandwiched therebetween, wherein the frequency adjusting of the filter is performed by partially removing an open circuit end (15a,16a,17a) of each resonator conductor and at need by adding an compensating conductor member (21) to the partially removed open circuit end portion of each resonator conductor.
Inventors
- 👤 Hiroyuki Shimizu
- 👤 Kenji Ito
- 👤 Naomasa Wakita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 16:04
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20336
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A method of adjusting a frequency response of a filter device of a three-conductor structure type comprising a pair of dielectric substrates each having an outer surface provided with an external ground conducting layer and opposite lateral surfaces provided with no ground conducting layer, and a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to the ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of the associated lateral surface of said each substrate, wherein it comprises the step of partially removing the open circuit end of said each resonator conducting layer and the associated lateral surface of said each substrate at a portion which surrounds the open circuit end of said each resonator conducting layer for tuning the filter device to a desired frequency response.
Claim 2
Independent Claim
150 words
A method of adjusting a frequency response of a filter device of a three-conductor structure type comprising a pair of dielectric substrates each having an outer surface provided with an external ground conducting layer and opposite lateral surfaces provided with no ground conducting layer, and a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to the ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of the associated lateral surface of said each substrate, wherein it comprises the step of partially removing the open circuit end of said each resonator conducting layer and the associated lateral surface of said each substrate at a portion which surrounds the open circuit end of said each resonator conducting layer for tuning the filter device to a desired frequency response.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1, wherein said removing step is performed by using a cutting tool, a laser beam machining, a sand blasting or the like.
Claim 4
Independent Claim
188 words
A method of adjusting a frequency response of a filter device of a three-conductor structure type comprising a pair of dielectric substrates each having an outer surface provided with an external ground conducting layer and opposite lateral surfaces provided with no ground conducting layer, and a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to the ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of the associated lateral surface of said each substrate, wherein it comprises the steps of partially removing the open circuit end of said each resonator conducting layer and the associated lateral surface of said each substrate at a portion which surrounds the open circuit end of said each resonator conducting layer for tuning the filter device to a desired frequency response, and providing an additional conductor member to the open circuit end of said each resonator conducting layer on the lateral surface of said each substrate for compensating any overshoot of the adjustment performed by said first removing step.
Claim 5
Independent Claim
188 words
A method of adjusting a frequency response of a filter device of a three-conductor structure type comprising a pair of dielectric substrates each having an outer surface provided with an external ground conducting layer and opposite lateral surfaces provided with no ground conducting layer, and a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to the ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of the associated lateral surface of said each substrate, wherein it comprises the steps of partially removing the open circuit end of said each resonator conducting layer and the associated lateral surface of said each substrate at a portion which surrounds the open circuit end of said each resonator conducting layer for tuning the filter device to a desired frequency response, and providing an additional conductor member to the open circuit end of said each resonator conducting layer on the lateral surface of said each substrate for compensating any overshoot of the adjustment performed by said first removing step.
Claim 6
Dependent Claim
29 words
A method as claimed in claim 3, wherein said each removing step is performed by using a cutting tool, a laser beam machining, a sand blasting or the like.
Claim 7
Dependent Claim
143 words
A filter device of a three-conductor structure type comprising a pair of dielectric substrates each having a lateral and outer surfaces; an external ground conducting layer provided on the outer surface of said each dielectric substrate; a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to said ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of one lateral surface of said each substrate, the open circuit end of said each resonator conducting layer having a portion removed therefrom for increasing a resonant frequency of the filter device; and a casing for containing a filter assembly of said dielectric substrates and said resonator conducting layers, said casing having an inner height equal to the thickness of said filter assembly.
Claim 8
Dependent Claim
143 words
A filter device of a three-conductor structure type comprising a pair of dielectric substrates each having a lateral and outer surfaces; an external ground conducting layer provided on the outer surface of said each dielectric substrate; a plurality of stripline resonator conducting layers sandwiched between said dielectric substrates, each resonator conducting layer having a short circuit end connected to said ground conducting layer on the outer surface of said each substrate and an open circuit end extended to an edge of one lateral surface of said each substrate, the open circuit end of said each resonator conducting layer having a portion removed therefrom for increasing a resonant frequency of the filter device; and a casing for containing a filter assembly of said dielectric substrates and said resonator conducting layers, said casing having an inner height equal to the thickness of said filter assembly.
Claim 9
Dependent Claim
35 words
A filter device as claimed in claim 5, wherein the open circuit end of said each resonator conducting layer is provided with an additional conductor member for decreasing a resonant frequency of the filter device.
References Cited (Backward Citations)
No citation records indexed.
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