US5136268A
Expired / Lapsed
US
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Miniature dual mode planar filters
Assignee: Lanteris Space LLC
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Filing: 1991-04-19
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Granted: 1992-08-04
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Expires: 2011-04-19
Abstract
Abstract A dual mode microstrip resonator (1) usable in the design of microwave communication filters. The substantially square resonator (1) provides paths for a pair of orthogonal signals which are coupled together using a perturbation located in at least one corner of the resonator (1). The perturbation can be introduced by notching (3) the resonator (1) or by adding a metallic or dielectric stub (5) to the resonator (1).
Inventors
- 👤 Slawomir J. Fiedziuszko
- 👤 John A. Curtis
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; H01P1/20354; H01P1/20381; H01P7/00; H01P7/08; H01P7/082; H01P7/084; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/866
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A dual mode planar filter comprising: substantially planar substantially square resonating means having a pair of orthogonal resonating paths for conducting two modes of electromagnetic signals and having a physical perturbation means located in at least one corner of the resonating means for coupling the electromagnetic signals between the two modes, said perturbation means altering the physical dimensions of said substantially planar substantially square resonating means; at least one signal input electromagnetically coupled to the resonating means for delivering electromagnetic signals to the resonating means such that the signals propagate along the resonating paths; and at least one signal output electrically coupled to the resonating means for delivering coupled electromatic signals from the resonating means.
Claim 2
Dependent Claim
115 words
A dual mode planar filter comprising: substantially planar substantially square resonating means having a pair of orthogonal resonating paths for conducting two modes of electromagnetic signals and having a physical perturbation means located in at least one corner of the resonating means for coupling the electromagnetic signals between the two modes, said perturbation means altering the physical dimensions of said substantially planar substantially square resonating means; at least one signal input electromagnetically coupled to the resonating means for delivering electromagnetic signals to the resonating means such that the signals propagate along the resonating paths; and at least one signal output electrically coupled to the resonating means for delivering coupled electromatic signals from the resonating means.
Claim 3
Dependent Claim
15 words
The planar filter as in claim 1 wherein the resonating means is implemented using microstrip.
Claim 4
Dependent Claim
12 words
The filter as in claim 2 wherein the microstrip is a superconductor.
Claim 5
Dependent Claim
16 words
The planar filter as in claim 1 wherein the resonating means is implemented using strip line.
Claim 6
Dependent Claim
13 words
The filter as in claim 4 wherein the strip line is a superconductor.
Claim 7
Dependent Claim
28 words
The planar filter as in claim 1 wherein the perturbation means comprises at least one notch for disturbing orthogonal electromagnetic signals, resulting in the coupling of electromagnetic signals.
Claim 8
Dependent Claim
28 words
The planar filter as in claim 1 wherein the perturbation means comprises a metallic stub for disturbing orthogonal electromagnetic signals, resulting in the coupling of the electromagnetic signals.
Claim 9
Dependent Claim
29 words
The planar filter as in claim 1 wherein the perturbation means comprises of a dielectric stub for disturbing orthogonal electromagnetic signals, resulting in the coupling of the electromagnetic signals.
Claim 10
Dependent Claim
26 words
The planar filter of claim 1 wherein said at least one signal input and output are electromagnetically coupled to the resonating means by a capacitive gap.
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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |