US3713165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna for strip transmission lines
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1970-10-05
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Granted: 1973-01-23
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Expires: 1990-10-05
Abstract
Abstract An antenna for strip transmission lines has slots of different lengths in the planar outer conductors. The slots are situated so that they intersect the planar inner conductor and each slot is matched for transmission or reception of signals with a certain frequency by the length of the slot and the distance from the slot to the end of the planar inner conductor. In one embodiment of the antenna the end of the planar inner conductor is formed to match the distances to the individual slots. In another embodiment of the antenna the slots merge to form only one cutout in the planar outer conductor.
Inventors
- 👤 T Svensson
- 👤 R Lagerlof
- 👤 L Sjoholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:44
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/106; G; G06; G06F; G06F3/00; G06F3/01; G06F3/002; G06F3/005; G06F3/017; G06T; G06T7/00; G06T7/97
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A wideband antenna comprising a strip transmission line having a planar inner conductor and at least one planar outer conductor separated from but electromagnetically coupled to each other by a dielectric medium, said planar inner conductor having a terminating end and said planar outer conductor being provided with a plurality of slots whose projections intersect said planar inner conductor, each of said slots having a length which is a multiple of one half the wavelength of a different particular signal frequency and the distance from each slot to the terminating end of said inner conductor being an odd multiple of a quarter of the wavelength of the associated particular signal frequency in such a way that the slots are displaced from the terminating end of said inner conductor in the order of increasing length with the shortest slot closest to said terminating end.
Claim 2
Dependent Claim
143 words
A wideband antenna comprising a strip transmission line having a planar inner conductor and at least one planar outer conductor separated from but electromagnetically coupled to each other by a dielectric medium, said planar inner conductor having a terminating end and said planar outer conductor being provided with a plurality of slots whose projections intersect said planar inner conductor, each of said slots having a length which is a multiple of one half the wavelength of a different particular signal frequency and the distance from each slot to the terminating end of said inner conductor being an odd multiple of a quarter of the wavelength of the associated particular signal frequency in such a way that the slots are displaced from the terminating end of said inner conductor in the order of increasing length with the shortest slot closest to said terminating end.
Claim 3
Dependent Claim
26 words
The antenna according to claim 1 wherein the width of the exterior part of said planar inner conductor decreases symmetrically with respect to its central line.
Claim 4
Dependent Claim
143 words
A wideband antenna comprising a strip transmission line having a planar inner conductor and at least one planar outer conductor separated from but electro-magnetically coupled to each other by a dielectric medium, said planar inner conductor having a terminating end and said planar outer conductor being provided with a cut out formed from a plurality of merged subslots whose projections intersect said planar inner conductor; each of said subslots having a length related to a different particular signal frequency and the distance from each subslot to the terminating end of said inner conductor being related to an odd multiple of a quarter of the wavelength of its associated particular signal frequency in such a way that the subslots are displaced from the terminating end of said inner conductor in the order of increasing length with the shortest slot closest to said terminating end.
Claim 5
Dependent Claim
143 words
A wideband antenna comprising a strip transmission line having a planar inner conductor and at least one planar outer conductor separated from but electro-magnetically coupled to each other by a dielectric medium, said planar inner conductor having a terminating end and said planar outer conductor being provided with a cut out formed from a plurality of merged subslots whose projections intersect said planar inner conductor; each of said subslots having a length related to a different particular signal frequency and the distance from each subslot to the terminating end of said inner conductor being related to an odd multiple of a quarter of the wavelength of its associated particular signal frequency in such a way that the subslots are displaced from the terminating end of said inner conductor in the order of increasing length with the shortest slot closest to said terminating end.
Claim 6
Dependent Claim
28 words
The antenna according to claim 3 in which the ends of adjacent subslots merge smoothly into the next to form at each end a continuum of subslot ends.
Claim 7
Dependent Claim
32 words
The antenna according to claim 3 in which the adjacent sides of adjacent slots are of different lengths to give at each end of the subslots a stepped profile of slot ends.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |