US4262269A
Expired / Lapsed
US
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Q Enhanced resonator
Assignee: The AT&T MVPD Group LLC
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Filing: 1979-12-10
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Granted: 1981-04-14
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Expires: 1999-12-10
Abstract
Abstract An active microwave filter for use in both bandpass and notch filter applications is herein described, the filter incorporating a distributed resonator to which is coupled an amplifier which provides a positive feedback and cancels the net dissipation in the resonator.
Inventors
- 👤 Edward L. Griffin
- 👤 Frederick A. Young
- 👤 Harvey M. Endler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:57
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20381; H01P1/2039
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A Q enhanced resonator for use in notch filter and bandpass filter applications, and the like, comprising: a radio frequency transmission media; a distributed resonator having adjacent but spaced ends, said resonator being coupled to said transmission media; and amplifier means coupled to said spaced ends of said resonator for providing a positive feedback and to cancel the net dissipation in said resonator.
Claim 2
Dependent Claim
63 words
A Q enhanced resonator for use in notch filter and bandpass filter applications, and the like, comprising: a radio frequency transmission media; a distributed resonator having adjacent but spaced ends, said resonator being coupled to said transmission media; and amplifier means coupled to said spaced ends of said resonator for providing a positive feedback and to cancel the net dissipation in said resonator.
Claim 3
Dependent Claim
25 words
The Q enhanced resonator according to claim 1, wherein said distributed resonator is disposed adjacent to but spaced a predetermined distance from said transmission media.
Claim 4
Dependent Claim
15 words
The Q enhanced resonator according to claim 1, wherein said distributed resonator is generally C-shaped.
Claim 5
Dependent Claim
31 words
The Q enhanced resonator according to claim 1, also comprising a substrate, and wherein said distributed resonator and said transmission media are adjacently disposed but in spaced relationship on said substrate.
Claim 6
Dependent Claim
30 words
The Q enhanced resonator according to claim 1, wherein said distributed resonator is an odd number of half wavelengths in length, and wherein said amplifier means includes an inverting amplifier.
Claim 7
Dependent Claim
30 words
The Q enhanced resonator acccording to claim 1, wherein said distributed resonator is an even number of half wavelengths in length, and wherein said amplifier means includes a non-inverting amplifier.
Claim 8
Dependent Claim
17 words
The Q enhanced resonator according to claim 1, wherein said amplifier means includes a FET amplifier circuit.
Claim 9
Dependent Claim
35 words
The Q enhanced resonator according to claim 1, wherein said distributed resonator, said transmission media and said amplifier means are in a microwave integrated circuit (MIC) configuration and are all disposed on a MIC substrate.
Claim 10
Dependent Claim
30 words
The Q enhanced resonator according to claim 1, wherein said distributed resonator is coupled to said transmission media on one side of said distributed resonator in a notch filter circuit.
Claim 11
Dependent Claim
36 words
The Q enhanced resonator according to claim 1, wherein said transmission media includes an input transmission line and an output transmission line, and wherein said transmission lines are coupled to opposite sides of said distributed resonator.
References Cited (Backward Citations)
US3514711A
Cited
US4129842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |