US4371877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-structure aerial
Assignee: US Philips Corp
•
Filing: 1981-04-22
•
Granted: 1983-02-01
•
Expires: 2001-04-22
Abstract
Abstract A thin-structure aerial is formed by means of a sheet of a dielectric substrate 1, whose rear surface is covered with a layer 2 of a conductive material and whose front surface has at least one radiating slot 4 formed in another layer 3 of a conductive material covering said substrate. Means 5are provided for simulating lateral walls surrounding at least one radiating slot. The aerial is characterized in that it is provided with at least one feed slot 10 which is formed in said layer of a conductive material covering the front surface and which is arranged parallel to and in the vicinity of the radiating slot.
Inventors
- 👤 Michel Doussot
- 👤 Christian Courtois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/106
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
An aerial comprising a sheet of dielectric having front and rear surfaces each covered with a layer of conductive material, the conductive layer on the front surface including: (a) at least one radiating slot; (b) at least one feed slot parallel to a radiating slot; (c) a conductive portion bounded by at least two of the slots in the layer; (d) a feed point in said conductive portion; and (e) means for defining sidewalls of a cavity which is disposed between said layers of conductive material, said side walls surrounding at least one radiating slot and said parallel feed slot.
Claim 2
Dependent Claim
100 words
An aerial comprising a sheet of dielectric having front and rear surfaces each covered with a layer of conductive material, the conductive layer on the front surface including: (a) at least one radiating slot; (b) at least one feed slot parallel to a radiating slot; (c) a conductive portion bounded by at least two of the slots in the layer; (d) a feed point in said conductive portion; and (e) means for defining sidewalls of a cavity which is disposed between said layers of conductive material, said side walls surrounding at least one radiating slot and said parallel feed slot.
Claim 3
Dependent Claim
30 words
An aerial as in claim 1, characterized in that said means for defining sidewalls comprise conductive elements which interconnect the layers of conductive material covering the front and rear surfaces.
Claim 4
Dependent Claim
46 words
An aerial as in claim 1, characterized in that said means for defining sidewalls comprises holes through the dielectric sheet having their sides covered by layers of a conductive material bringing the layer covering the front surface into contact with the layer covering the rear surface.
Claim 5
Dependent Claim
45 words
An aerial as in claim 1, characterized in that said means for defining sidewalls comprises crenellations in the conductive layer covering the front surface, the depth of the crenellations being such that an impedance of substantially zero is obtained at the bottom of said crenellations.
Claim 6
Dependent Claim
30 words
An aerial as in claim 1, 2, 3 or 4, characterized in that the feed point in the conductive portion is disposed between a radiating slot and a feed slot.
Claim 7
Dependent Claim
41 words
An aerial as in claim 1, 2, 3 or 4 including a coaxial connector comprising a contact pin electrically-connected to the feed point and a flange electrically-connected to the layer of conductive material covering the rear surface of the dielectric sheet.
Claim 8
Dependent Claim
55 words
An aerial as in claim 1, 2, 3 or 4 adapted to radiate a circularly polarized wave, characterized in that it comprises two radiating slots disposed perpendicularly to each other and in that the lengths of feed slots parallel to said radiating slots are selected so as to obtain phase-quadrature energization of the radiating slots.
References Cited (Backward Citations)
US2644090A
Cited
US3653052A
Cited
USRE29296E
Cited
US3823404A
Cited
US3832716A
Cited
US4110751A
Cited
US4238798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |