US4573054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excitation device for a dual band ultra-high frequency corrugated source of revolution
Assignee: Thales SA
•
Filing: 1983-04-26
•
Granted: 1986-02-25
•
Expires: 2003-04-26
Abstract
Abstract A device for exciting a corrugated ultra-high frequency source of revolution operating in two remote frequency bands, decoupled mechanically from the source. The device includes two excitation devices corresponding to the two operating bands, placed perpendicularly to each other, at respective distances from the mouth of the source such that the waves which they emit remain canalized in the Rayleigh zone of each device and provide optimum coupling between these device and the source.
Inventors
- 👤 Jean Bouko
- 👤 Jean-Claude Durand
- 👤 Jean Le Foll
- 👤 Francois Salvat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/0006; H01Q15/0013; H01Q15/0033
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
75 words
Excitation apparatus, comprising: a main corrugated radiator; means for providing low frequency excitation to said radiator; means for providing high frequency excitation to said radiator; and a spatial frequency filtering device disposed between said radiator and said low and said high frequency means, whereby said low and said high frequency means are physically decoupled from said radiator but are spaced from said radiator in such a way that hybrid balance is propagated in said radiator.
Claim 2
Dependent Claim
75 words
Excitation apparatus, comprising: a main corrugated radiator; means for providing low frequency excitation to said radiator; means for providing high frequency excitation to said radiator; and a spatial frequency filtering device disposed between said radiator and said low and said high frequency means, whereby said low and said high frequency means are physically decoupled from said radiator but are spaced from said radiator in such a way that hybrid balance is propagated in said radiator.
Claim 3
Dependent Claim
47 words
Apparatus according to claim 1, wherein said low and said high frequency means each have a Rayleigh zone, and wherein said radiator has a mouth which is disposed within the Rayleigh zone of both low and high frequency means and which receives said excitation from said means.
Claim 4
Dependent Claim
44 words
Apparatus according to claim 2 wherein the Rayleigh zone of each said low and said high frequency means equals D 2 /2λ, where D is equal to a diameter of said means and λ is equal to an operating wavelength of said means, respectively.
Claim 5
Dependent Claim
66 words
Apparatus according to claim 1 wherein said low frequency means has a propagation axis Δ, said high frequency means has a propagation axis Δ" which is substantially perpendicular to said axis Δ, said radiator has a propagation axis Δ' which is substantially parallel to said axis Δ, and said spatial frequency filtering device is disposed at approximately a 45° angle from said axes Δ and Δ".
Claim 6
Dependent Claim
39 words
Apparatus according to claim 4 wherein said spatial frequency filtering device passes said low frequency radiation but reflects said high frequency radiation by approximately 90° so that both low and high frequency radiation enter said radiator along axis Δ'.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 1 wherein said low and said high frequency means each include a waveguide.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 6 wherein each said waveguide has an internal wall which is smooth.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 6 wherein each said waveguide has an internal wall which is corrugated.
Claim 10
Dependent Claim
14 words
Apparatus according to claim 6 wherein each said waveguide has a rectangular cross section.
Claim 11
Dependent Claim
14 words
Apparatus according to claim 7 wherein each said waveguide has a circular cross section.
Claim 12
Dependent Claim
17 words
Apparatus according to claim 1 wherein said low and said high frequency means each include a horn.
Claim 13
Dependent Claim
16 words
Apparatus according to claim 11 wherein each said horn has an internal wall which is smooth.
Claim 14
Dependent Claim
16 words
Apparatus according to claim 11 wherein each said horn has an internal wall which is corrugated.
Claim 15
Dependent Claim
14 words
Apparatus according to claim 11 wherein each said horn has a rectangular cross section.
Claim 16
Dependent Claim
14 words
Apparatus according to claim 11 wherein each said horn has a circular cross section.
Claim 17
Dependent Claim
21 words
Apparatus according to claim 1 wherein said low frequency means includes a waveguide, and said high frequency means includes a horn.
References Cited (Backward Citations)
DE974843C
Cited
US3698001A
Cited
FR2281660A1
Cited
FR2349968A1
Cited
JPS54116869A
Cited
US4258366A
Cited
JPS55141806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |