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Patent US3605101A successfully refreshed from Google Patents.
US3605101A
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Dual mode conical horn antenna
Assignee: AT&T Inc
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Filing: 1969-09-30
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Granted: 1971-09-14
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Expires: 1989-09-30
Abstract
Abstract A circular rod having tapered ends is coaxially mounted within a conical horn antenna. When energy in the TE*11 mode is fed into the throat of the antenna, it transforms smoothly over the length of the rod into the hybrid HE*11 mode. At the antenna aperture, the energy again transforms and this time appears in correctly phased TE*11 and TM*11 modes.
Inventors
- 👤 Nicholas J Kolettis
- 👤 Elliott R Nagelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:28
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
An antenna for operation over a particular frequency band, said antenna comprising, a tapered waveguide of circular cross section having an interior wall void of any irises for mode conversion within said frequency band, a minimum inside diameter equal to that of a cylindrical waveguide in which energy in the TE*11 mode can be supported and a maximum inside diameter equal to that of a cylindrical waveguide in which energy in the TE*11 and TM*11 modes can be supported, a dielectric rod having a circular cross section, a continuous external surface void of any openings, a length no greater than the length of said tapered waveguide, a dielectric constant greater than that of air and, furthermore, both ends tapered to substantial points with the remainder of said rod having a substantially constant circular cross section, and means coaxially mounting said rod completely within said tapered waveguide.
Claim 2
Dependent Claim
146 words
An antenna for operation over a particular frequency band, said antenna comprising, a tapered waveguide of circular cross section having an interior wall void of any irises for mode conversion within said frequency band, a minimum inside diameter equal to that of a cylindrical waveguide in which energy in the TE*11 mode can be supported and a maximum inside diameter equal to that of a cylindrical waveguide in which energy in the TE*11 and TM*11 modes can be supported, a dielectric rod having a circular cross section, a continuous external surface void of any openings, a length no greater than the length of said tapered waveguide, a dielectric constant greater than that of air and, furthermore, both ends tapered to substantial points with the remainder of said rod having a substantially constant circular cross section, and means coaxially mounting said rod completely within said tapered waveguide.
Claim 3
Dependent Claim
138 words
An antenna for operation over a particular frequency band, said antenna comprising, a waveguide of circular cross section having an interior wall void of any irises for mode conversion within said frequency band, an input end with an inside diameter to support energy in the TE*11 mode, an output end with an inside diameter to support energy in the TE*11 and TM*11 modes and a substantially uniform taper between said ends, a dielectric rod having a circular cross section, a continuous external surface void of any openings, a length no greater than the length of said tapered waveguide a dielectric constant greater than that of air and, furthermore, both ends tapered to substantial points with the remainder of said rod having a substantially constant circular cross section, and means coaxially mounting said rod completely within said tapered waveguide.
Claim 4
Dependent Claim
138 words
An antenna for operation over a particular frequency band, said antenna comprising, a waveguide of circular cross section having an interior wall void of any irises for mode conversion within said frequency band, an input end with an inside diameter to support energy in the TE*11 mode, an output end with an inside diameter to support energy in the TE*11 and TM*11 modes and a substantially uniform taper between said ends, a dielectric rod having a circular cross section, a continuous external surface void of any openings, a length no greater than the length of said tapered waveguide a dielectric constant greater than that of air and, furthermore, both ends tapered to substantial points with the remainder of said rod having a substantially constant circular cross section, and means coaxially mounting said rod completely within said tapered waveguide.
References Cited (Backward Citations)
US3413642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |