US3798652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitot tube dielectric antenna system
Assignee: General Electric Co
•
Filing: 1972-09-11
•
Granted: 1974-03-19
•
Expires: 1992-09-11
Abstract
Abstract A metallic conductor protruding from a surface, for example, a pitot tube protruding from an aircraft surface is coated on its periphery with a low loss dielectric in order to form an antenna. Functions of the pitot tube and antenna are combined in one structure, and the need for a radome is eliminated. Monopulse feed may be provided to the dielectric rod comprising the antenna.
Inventors
- 👤 E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:34
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
A radio frequency antenna for use on an aircraft comprising, in combination: a metallic cylindrical tube forming a part of a pitot tube mounted at the nose of said aircraft; RF feed means for coupling RF energy to said tube, said feed means including an E plane hybrid with first and second waveguides branching from said hybrid and connected to opposed sides of said tube at the end thereof adjacent the nose of said aircraft; and a layer of low loss dielectric material covering the outer surface of said tube, said layer tapering from a maximum thickness near the nose of said aircraft to a minimum thickness at the end of said tube farthest from said nose, said layer acting to minimize side lobes in the energy pattern radiated by said tube.
Claim 2
Dependent Claim
132 words
A radio frequency antenna for use on an aircraft comprising, in combination: a metallic cylindrical tube forming a part of a pitot tube mounted at the nose of said aircraft; RF feed means for coupling RF energy to said tube, said feed means including an E plane hybrid with first and second waveguides branching from said hybrid and connected to opposed sides of said tube at the end thereof adjacent the nose of said aircraft; and a layer of low loss dielectric material covering the outer surface of said tube, said layer tapering from a maximum thickness near the nose of said aircraft to a minimum thickness at the end of said tube farthest from said nose, said layer acting to minimize side lobes in the energy pattern radiated by said tube.
Claim 3
Dependent Claim
74 words
The antenna set forth in claim 1 wherein said RF feed means further comprises: a second E plane hybrid with third and fourth waveguides branching therefrom and connecting to opposed sides of said tube between said first and second waveguides; and means for feeding said first and second E plane hybrids with RF signals having the same frequency and a 90 degree relative phase difference whereby said antenna radiates a circularly polarized wave pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |