US3924205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-polarized parabolic antenna
Assignee: Commscope Technologies LLC
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Filing: 1974-09-03
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Granted: 1975-12-02
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Expires: 1994-09-03
Abstract
Abstract A cross-polarized parabolic antenna employs a horn fed by two rectangular waveguides having their longer transverse dimension in a common plane, with a 90* polarization rotator in the feed between the connection points of the waveguide.
Inventors
- 👤 Laurence H Hansen
- 👤 Robert E Massey
- 👤 Aloysius Wojnowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/161; H01Q; H01Q13/00; H01Q13/02; H01Q13/025; H01Q13/0258; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
In a waveguide system for propagating crosspolarized highfrequency radiation comprising a circular waveguide and a pair of rectangular waveguides connected thereto and extending radially therefrom, means for supplying a first linearly polarized high frequency radiation signal to one of the rectangular waveguides, and means for supplying a second linearly polarized high frequency radiation signal to the other rectangular waveguide, the first and second signals being polarized in the same direction, the improvement characterized by the longer transverse H-plane dimension of both rectangular waveguides being aligned in a common plane at their points of connection to the circular waveguide, the circular waveguide having therein a 90* polarization rotator between the points of connection thereto of the respective rectangular waveguides for producing orthogonality of the first and second signals supplied to the circular waveguide through the rectangular waveguides, said polarization rotator comprising stationary passive conductor means.
Claim 2
Dependent Claim
144 words
In a waveguide system for propagating crosspolarized highfrequency radiation comprising a circular waveguide and a pair of rectangular waveguides connected thereto and extending radially therefrom, means for supplying a first linearly polarized high frequency radiation signal to one of the rectangular waveguides, and means for supplying a second linearly polarized high frequency radiation signal to the other rectangular waveguide, the first and second signals being polarized in the same direction, the improvement characterized by the longer transverse H-plane dimension of both rectangular waveguides being aligned in a common plane at their points of connection to the circular waveguide, the circular waveguide having therein a 90* polarization rotator between the points of connection thereto of the respective rectangular waveguides for producing orthogonality of the first and second signals supplied to the circular waveguide through the rectangular waveguides, said polarization rotator comprising stationary passive conductor means.
Claim 3
Dependent Claim
44 words
The waveguide system of claim 1 characterized by the polarization rotator comprising conductor means between the rectangular waveguide connections extending diametrically across the circular waveguide and forming a 90* twisted baffle with one end in said common plane and the other end perpendicular thereto.
Claim 4
Dependent Claim
23 words
The waveguide system of claim 2 wherein the conductor means comprises a series of closely spaced pins extending across successively slightly rotated diameters.
Claim 5
Dependent Claim
37 words
The waveguide system of claim 2 having added conductor means forming a planar extension of one of said ends to form an isolation section blocking undesired propagation from the rectangular waveguide at that end into the rotator.
Claim 6
Dependent Claim
34 words
The waveguide system of claim 1 wherein the rectangular waveguides have generally parallel bent runs throughout their length, all bends being in the common H-plane, the rectangular waveguides extending radially from the circular waveguide.
References Cited (Backward Citations)
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US2735092A
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US2975380A
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |