US4837535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant wave filter
Assignee: Uniden Corp
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Filing: 1989-01-05
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Granted: 1989-06-06
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Expires: 2009-01-05
Abstract
Abstract A compact resonant wave filter capable of selectively propagating an electromagnetic wave of a prescribed frequency with excellent band-pass wave filter characteristics comprises a TM mode resonator disposed perpendicularly to the direction of propagation of electromagnetic wave energy, a pair of TEM mode resonators disposed one on either side or said TM mode resonator in the direction of propagation of electromagnetic wave energy, and a pair of cutoff waveguides disposed one between said TEM mode resonator and each of said TM mode resonators to couple said TEM mode resonator with said TM mode resonators in evanescent mode.
Inventors
- 👤 Yoshihiro Konishi
- 👤 Kenichi Konno
- 👤 Ikuo Awai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:44
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P1/2056; H01P1/207; H01P1/208; H01P1/2088; H01P1/219
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A resonant wave filter capable of selectively propagating an electromagnetic wave of a prescribed frequency comprising a TM mode resonator disposed perpendicularly to the direction of propagation of electromagnetic wave energy, a pair of TEM mode resonators disposed one on either side or said TM mode resonator in the direction of propagation of electromagnetic wave energy, and a pair of cutoff waveguides disposed one between said TEM mode resonator and each of said TM mode resonators to couple said TEM mode resonator with said TM mode resonators in evanescent mode.
Claim 2
Dependent Claim
90 words
A resonant wave filter capable of selectively propagating an electromagnetic wave of a prescribed frequency comprising a TM mode resonator disposed perpendicularly to the direction of propagation of electromagnetic wave energy, a pair of TEM mode resonators disposed one on either side or said TM mode resonator in the direction of propagation of electromagnetic wave energy, and a pair of cutoff waveguides disposed one between said TEM mode resonator and each of said TM mode resonators to couple said TEM mode resonator with said TM mode resonators in evanescent mode.
Claim 3
Dependent Claim
17 words
A resonant wave filter according to claim 1 wherein said TM mode resonator is a waveguide resonator.
Claim 4
Dependent Claim
19 words
A resonant wave filter according to claim 1 wherein said TM mode resonator is a plurality of waveguide resonators.
Claim 5
Dependent Claim
17 words
A resonant wave filter according to claim 1 wherein said TEM mode resonator is a coaxial resonator.
Claim 6
Dependent Claim
19 words
A resonant wave filter according to claim 1 wherein said TEM mode resonator is a plurality of coaxial resonators.
Claim 7
Dependent Claim
20 words
A resonant wave filter according to claim 2 wherein the interior of said waveguide resonator is filled with a dielectric.
Claim 8
Dependent Claim
20 words
A resonant wave filter according to claim 4 wherein the interior of said coaxial resonator is filled with a dielectric.
Claim 9
Dependent Claim
20 words
A resonant wave filter according to claim 1 wherein the interior of said cutoff waveguide is filled with a dielectric.
References Cited (Backward Citations)
US4626809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |