US4553266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R.F. Circuit arrangement
Assignee: US Philips Corp
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Filing: 1983-08-08
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Granted: 1985-11-12
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Expires: 2003-08-08
Abstract
Abstract An R.F. circuit with at least one R.F. transmission line including a strip conductor (15) and a ground plane (13) on an insulating substrate (3) and having two diodes (24, 25) respectively D.C.-connected to two portions (38,39) of the ground plane (13). The two portions are mutually D.C.-isolated by a slot (37) to enable the diodes (24, 25) to be biased. The substrate (3) is mounted in a housing (1, 2) of conductive material, and the two portions (38, 39) of the ground plane (13) are mutually R.F.-coupled via the conductive material. One of the portions (39) is electrically-connected to an adjacent housing member (2) and the other portion (38) is separated therefrom by a thin insulating layer. The slot (37) inhibits coupling of R.F. energy out of the circuit into the slot (37), suitably being very narrow, e.g. 20 μm, so as to form a further transmission line with a very low characteristic impedance and also to have a high attenuation along its length for operation at mm-wavelengths.
Inventors
- 👤 Robert N. Bates
- 👤 Philip M. Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0633; H03D9/0641; H03D2200/00; H03D2200/0001; H03D2200/0023; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
An R.F. circuit arrangement comprising an insulative substrate, at least one R.F. strip-type transmission line including a strip conductor and a ground plane conductor disposed on the substrate, and first and second diodes each electrically-connected between the strip conductor and a respective one of first and second portions of the ground plane conductor, said circuit arrangement including coupling means for D.C.-isolating and R.F.-coupling said first and second portions, comprising: (a) a slot in the ground plane conductor for D.C. isolating the first and second portions thereof, said slot being sufficiently narrow to inhibit the coupling of R.F. energy into the slot; (b) a housing comprising first and second conductive portions adjacent to the first and second portions of the ground plane conductor; and (c) an insulative layer disposed between at least said first housing portion and said first ground plane portion; said housing and said insulative layer effecting said R.F. coupling of the first and second portions of the ground plane conductor.
Claim 2
Dependent Claim
162 words
An R.F. circuit arrangement comprising an insulative substrate, at least one R.F. strip-type transmission line including a strip conductor and a ground plane conductor disposed on the substrate, and first and second diodes each electrically-connected between the strip conductor and a respective one of first and second portions of the ground plane conductor, said circuit arrangement including coupling means for D.C.-isolating and R.F.-coupling said first and second portions, comprising: (a) a slot in the ground plane conductor for D.C. isolating the first and second portions thereof, said slot being sufficiently narrow to inhibit the coupling of R.F. energy into the slot; (b) a housing comprising first and second conductive portions adjacent to the first and second portions of the ground plane conductor; and (c) an insulative layer disposed between at least said first housing portion and said first ground plane portion; said housing and said insulative layer effecting said R.F. coupling of the first and second portions of the ground plane conductor.
Claim 3
Dependent Claim
28 words
An R.F. circuit arrangement as in claim 1 where the second conductive portion of the housing is in contact with the second portion of the ground plane conductor.
Claim 4
Dependent Claim
40 words
An R.F. circuit arrangement as in claim 1 or 2 where the slot has a portion adjacent to the strip-type transmission line, said slot portion presenting an impedance which differs greatly from the local characteristic impedance of said transmission line.
Claim 5
Dependent Claim
27 words
An R.F. circuit arrangement as in claim 3 where the impedance presented by the slot is much smaller than the local characteristic impedance of the transmission line.
Claim 6
Dependent Claim
47 words
An R.F. circuit arrangement as in claim 1 or 2 where the strip conductor is on a first side of the substrate, where the ground plane conductor is on an opposite side of the substrate, and where the slot includes a portion juxtaposed with the strip conductor.
Claim 7
Dependent Claim
26 words
An R.F. circuit arrangement as in claim 5 where said juxtaposed portion of the slot is disposed alongside a central longitudinal axis of said strip conductor.
References Cited (Backward Citations)
US3939430A
Cited
US4032849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |