US4264881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave device provided with a 1/2 lambda resonator
Assignee: US Philips Corp
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Filing: 1977-12-15
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Granted: 1981-04-28
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Expires: 1997-12-15
Abstract
Abstract A microwave device is disclosed comprising a microstrip line pattern including an open ring forming a 1/2λ resonator having a narrow gap in which the electromagnetic field is closely tied to the ring.
Inventors
- 👤 Frans C. DE Ronde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:39
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/08; H01P7/082; H01P1/00; H01P1/20; H01P1/201; H01P1/203
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
A microwave device comprising a dielectric substrate, a conducting ground plane disposed on one major surface of the substrate and a line pattern disposed on the other major surface of the substrate, said line pattern including a straight microstrip line and at least two open-rings each forming a 1/2λ resonator, said rings each having a gap and being coupled to one another and to said straight line.
Claim 2
Dependent Claim
67 words
A microwave device comprising a dielectric substrate, a conducting ground plane disposed on one major surface of the substrate and a line pattern disposed on the other major surface of the substrate, said line pattern including a straight microstrip line and at least two open-rings each forming a 1/2λ resonator, said rings each having a gap and being coupled to one another and to said straight line.
Claim 3
Dependent Claim
27 words
A microwave device as claimed in claim 1, wherein each of the 1/2λ open-ring resonators is coupled to the microstrip line by a further 1/2λ open-ring resonator.
Claim 4
Dependent Claim
125 words
A microwave device as claimed in claim 1, further including a second microstrip line arranged parallel to said straight microstrip line and coupled to the two 1/2λ open-ring resonators, and two additional pairs of 1/2λ resonators arranged at a distance equal to an odd multiple of 1/4λ from the center of the two 1/2λ open-ring resonators measured in the same direction along the microstrip lines, the ring resonators of each additional pair being coupled to one another, while one pair is coupled to one microstrip line and the other pair is coupled to the other microstrip line, the additional pairs of resonators being situated at the side of the microstrip lines opposite to the side on which are situated the two 1/2λ open-ring resonators .
Claim 5
Dependent Claim
57 words
A microwave device comprising a dielectric substrate, a conducting ground plane disposed on one major surface of the substrate, and a line pattern disposed on the other major surface of the substrate, said line pattern including an open-ring forming a 1/2λ resonator and having two gaps, one of said gaps being shunted by a negative resistance element.
Claim 6
Dependent Claim
57 words
A microwave device comprising a dielectric substrate, a conducting ground plane disposed on one major surface of the substrate, and a line pattern disposed on the other major surface of the substrate, said line pattern including an open-ring forming a 1/2λ resonator and having two gaps, one of said gaps being shunted by a negative resistance element.
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |