US3579152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interdigital stripline filter means with thin shorting shim
Assignee: American Electronic Laboratories Inc
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Filing: 1968-09-05
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Granted: 1971-05-18
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Expires: 1988-09-05
Abstract
Abstract A stripline interdigital filter means in which the stripline ground planes are metal layers on the outer surfaces of a pair of mating sheets of an insulating material, the resonator strips and coupling strips of the filter are a printed circuit on the mating surfaces of one of the insulating sheets, and the shorting member of the filter is a thin metal shim having shorting tabs extending between the mating surfaces of the insulating sheets and clamped against the resonator strips.
Inventors
- 👤 Michael Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:17
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20336; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
222 words
A stripline filter means comprising a pair of sheets of an electrical insulating material having inner opposed mating surfaces, conductive means extending along the outer surface of each of said sheets, said conducting means providing the ground planes of the stripline filter means, a plurality of thin narrow strips of an electrically conductive metal secured to and extending across the mating surface of one of said sheets in side-by-side spaced parallel relation, said strips providing the resonators of the stripline filter means, a pair of narrow coupling strips of an electrically conductive metal secured to and extending across the mating surface of said one sheet parallel to said resonator strips, each of said coupling strips being at an opposite end of the array of the resonator strips, a thin shorting shim of an electrically conductive metal extending around the periphery of said sheets, said shorting shim having a plurality of spaced tabs extending between the mating surfaces of said sheets with each of said tabs contacting a separate one of said resonator strips and electrically connecting together a plurality of said resonator strips, means securing said sheets together with the shorting shim tabs being clamped between said sheets and into contact with their respective resonator strips, and a pair of conductors each electrically connected with a respective one of the coupling strips.
Claim 2
Dependent Claim
222 words
A stripline filter means comprising a pair of sheets of an electrical insulating material having inner opposed mating surfaces, conductive means extending along the outer surface of each of said sheets, said conducting means providing the ground planes of the stripline filter means, a plurality of thin narrow strips of an electrically conductive metal secured to and extending across the mating surface of one of said sheets in side-by-side spaced parallel relation, said strips providing the resonators of the stripline filter means, a pair of narrow coupling strips of an electrically conductive metal secured to and extending across the mating surface of said one sheet parallel to said resonator strips, each of said coupling strips being at an opposite end of the array of the resonator strips, a thin shorting shim of an electrically conductive metal extending around the periphery of said sheets, said shorting shim having a plurality of spaced tabs extending between the mating surfaces of said sheets with each of said tabs contacting a separate one of said resonator strips and electrically connecting together a plurality of said resonator strips, means securing said sheets together with the shorting shim tabs being clamped between said sheets and into contact with their respective resonator strips, and a pair of conductors each electrically connected with a respective one of the coupling strips.
Claim 3
Dependent Claim
58 words
The means of claim 1 in which the shorting shim has two sets of tabs, one set of the tabs extending between said sheets from one edge of the sheets and contacting alternate resonator strips, and the other set of tabs extending between said sheets from the opposite edge of the sheets and engaging the other resonator strips.
Claim 4
Dependent Claim
27 words
The means of claim 1 in which said pair of conductors each have a conductor pin extending into contact with a respective one of said coupling strips.
Claim 5
Dependent Claim
33 words
The means of claim 1 in which said conductive means comprises first and second layers of electrically conducting metal respectively extending over and secured to the outer surface of each of said sheets.
Claim 6
Dependent Claim
65 words
The means of claim 4 in which the means securing the sheets together comprises a pair of housing bodies having opposed mating surfaces, opposed mating cavities in the mating surfaces of The housing bodies, each of said sheets being seated in a separate one of said cavities with the ground plane layer facing the bottom of the cavity, and means securing said housing bodies together.
Claim 7
Dependent Claim
20 words
The means of claim 5 in which the shorting shim is clamped between the mating surfaces of said housing bodies.
Claim 8
Dependent Claim
65 words
The means of claim 6 in which a plurality of alignment pins are secured to and extend perpendicularly from the mating surface of one of said housing bodies, the shorting shim and the mating surface of the other housing body each has alignment holes therethrough through which the alignment pins extend to align the housing bodies and the shorting shim with respect to each other.
Claim 9
Dependent Claim
111 words
The means of claim 7 in which the mating surface of each of said housing bodies has a pair of spaced conductor recesses extending from an edge of the housing body to an edge of the cavity, each of the conductor recesses in one of the housing bodies being in opposed mating relation with a separate one of the conductor recesses in the other housing body, the conductors are mounted on said edges of the housing bodies with each conductor being in alignment with a respective set of mating conductor recesses, said conductors each having a conductor pin extending through its said conductor recess into contact with its respective coupling strip.
Claim 10
Dependent Claim
23 words
The means of claim 8 in which the shorting shim is broken along the edges of the two sets of the conductor recesses.
Claim 11
Dependent Claim
122 words
The means of claim 7 in which one of the housing bodies has a pair of spaced conductor holes extending therethrough from its outer surface and opening into the cavity in said one housing body, the sheet in the cavity of said one housing body has a pair of spaced notches in an edge thereof with each notch being in alignment with a separate one of said conductor holes, the conductors are mounted on the outer surface of said one housing body with each conductor being in alignment with a separate one of the connector holes, said conductors each having a conductor pin extending through its said conductor hole and the notch in said sheet into contact with its respective coupling strip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |