US3605045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-band strip line frequency-selective circuit
Assignee: United States Department of the Navy
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Filing: 1969-01-15
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Granted: 1971-09-14
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Expires: 1989-01-15
Abstract
Abstract A wide-band frequency-selective microwave circuit having ground planes, dielectric layers, and conductive strip sections. The conductive strip sections are in the same plane and juxtaposed to each other to form resonant circuit elements.
Inventors
- 👤 Alan J Ramsbotham Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:14
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20363
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A microwave frequency-selective circuit having a resonant wavelength lambda Omicron comprising a first conductive layer adapted to be maintained at a reference potential, a first layer of dielectric material disposed atop said first conductive layer, and a plurality of elongate conductive strip sections located in a plane parallel to and contiguous with said first layer of dielectric material, at least two of said strip sections disposed in parallel-spaced relation with each other of length at least lambda Omicron /4 and juxtaposed over their entire lengths to provide a circuit element resonant within the operating range of said frequency-selective circuit, at least one strip section parallel to said two strip sections and lying therebetween for at least a distance lambda Omicron /4 to provide a coupling section for said frequency-selective circuit.
Claim 2
Dependent Claim
130 words
A microwave frequency-selective circuit having a resonant wavelength lambda Omicron comprising a first conductive layer adapted to be maintained at a reference potential, a first layer of dielectric material disposed atop said first conductive layer, and a plurality of elongate conductive strip sections located in a plane parallel to and contiguous with said first layer of dielectric material, at least two of said strip sections disposed in parallel-spaced relation with each other of length at least lambda Omicron /4 and juxtaposed over their entire lengths to provide a circuit element resonant within the operating range of said frequency-selective circuit, at least one strip section parallel to said two strip sections and lying therebetween for at least a distance lambda Omicron /4 to provide a coupling section for said frequency-selective circuit.
Claim 3
Dependent Claim
58 words
A microwave frequency-selective circuit according to claim 1 wherein said coupling section provided by said strip section parallel to said two strip sections is an input coupling section, said two strip sections are of length approximately lambda Omicron /2, and said plurality of elongate conductive strip sections further includes a strip section for providing an output coupling section.
Claim 4
Dependent Claim
22 words
A microwave frequency-selective circuit according to claim 2 wherein said output coupling section is in axial alignment with said input coupling section.
Claim 5
Dependent Claim
22 words
A microwave frequency-selective circuit according to claim 2 wherein said output coupling section is in axial alignment with said resonant circuit element.
Claim 6
Dependent Claim
60 words
A microwave frequency-selective circuit according to claim 3 wherein said elongate conductive strIp sections include at least one strip section of length approximately lambda Omicron /2 intermediate of and axially aligned with said input and output coupling sections and at least one pair of strip sections of a length approximately lambda Omicron /2 axially aligned with said resonant circuit element.
Claim 7
Dependent Claim
36 words
A microwave frequency-selective circuit according to claim 1 wherein said two strip sections are connected electrically in parallel and include two terminals, and said strip section parallel to said two strip sections includes two additional terminals.
Claim 8
Dependent Claim
59 words
A microwave frequency-selective circuit according to claim 6 wherein said strip sections are of a length approximately lambda Omicron /4 and juxtaposed over their entire lengths, said two terminals are at opposite elongate ends of said two strip sections, and said two additional terminals are at opposite elongate ends of said strip section parallel to said two strip sections.
Claim 9
Dependent Claim
68 words
A microwave frequency-selective circuit according to claim 1 further comprising a second layer of dielectric material atop and contiguous with said plurality of elongate conductive strip sections and located in a plane parallel to said first dielectric layer, and a second conductive layer adapted to be maintained at a reference potential atop and contiguous with said second layer of dielectric material and parallel to said first conductive layer.
Claim 10
Dependent Claim
22 words
A microwave frequency-selective circuit according to claim 8 wherein said plurality of elongate conductive strip sections is equidistant from said conductive layers.
Claim 11
Dependent Claim
27 words
A microwave frequency-selective circuit according to claim 8 wherein said plurality of elongate conductive strip sections is closer to one conductive layer than the other conductive layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |