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US3737815A
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High-q bandpass resonators utilizing bandstop resonator pairs
Assignee: Individual
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Filing: 1970-11-27
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Granted: 1973-06-05
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Expires: 1990-11-27
Abstract
Abstract This disclosure describes high-Q bandpass resonators utilizing composite bandstop resonator pairs. The bandstop resonator pairs are formed of composite series or parallel connected realizable transmission line elements. The elements are exclusively either quarter-wavelength lines or half-wavelength lines.
Inventors
- 👤 G Low
- 👤 H Okean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/2039; H01P7/00; H01P7/08; H01P7/082; H01P7/084
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
A high-Q bandpass resonator having a center frequency fo comprising: first R resonator having ( pi /4) frequency ZfR , fR being greater than fo, which is a composite transmission line element that is a half wavelength long at frequency fR and is shortcircuited; and a second bandstop resonator having a center frequency fR , fR being less than fo, which is a composite transmission line element that is half wavelength long at frequency fR and is short-circuited; where said first and second bandstop resonators are parallel-connected.
Claim 2
Dependent Claim
87 words
A high-Q bandpass resonator having a center frequency fo comprising: first R resonator having ( pi /4) frequency ZfR , fR being greater than fo, which is a composite transmission line element that is a half wavelength long at frequency fR and is shortcircuited; and a second bandstop resonator having a center frequency fR , fR being less than fo, which is a composite transmission line element that is half wavelength long at frequency fR and is short-circuited; where said first and second bandstop resonators are parallel-connected.
Claim 3
Dependent Claim
15 words
A high-Q bandpass resonator as claimed in claim 1 formed of microstipline transmission line elements.
References Cited (Backward Citations)
US2964718A
Cited
GB941284A
Cited
US2968012A
Cited
US3345589A
Cited
US3343069A
Cited
US3417351A
Cited
US3444485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |