US3573833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband dielectric lens antenna fed by multiconductor quasi-tem lines
Assignee: Raytheon Co
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Filing: 1969-07-22
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Granted: 1971-04-06
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Expires: 1989-07-22
Abstract
Abstract The apparatus of the present invention provides a feed system utilizing a dielectric lens that is conical on one side and a truncated ellipsoid on the other, with the vertex of the cone coinciding with the focal point of the ellipsoid that is farthest from the convex side thereof. No less than two angular or conical conductors emanating from a multiple-port feed network are disposed longitudinally along the conical portion of the dielectric lens to the point of maximum lens diameter, whereat the conductors are connected together. To achieve monopulse capability and dual polarization, a multiconductor TEM line having no less than five conductors with the proper relative phasing therebetween is used to feed the lens. Proper relative phasing between lines is achieved with a broadband hybrid network.
Inventors
- 👤 James S Ajioka
- 👤 Raymond H Du Hamel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q25/00; H01Q25/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant, truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of dielectric material of said predetermined dielectric constant extending from the truncated surface of said ellipsoid to said one focal point, thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; a plurality of no less than two equal length flat conductors disposed longitudinally along and at uniform intervals about said cone commencing from said circular conductor; and a transmission line having a corresponding plurality of conductors connected to the respective extremities of said plurality of flat conductors farthest from said circular conductor.
Claim 2
Dependent Claim
130 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant, truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of dielectric material of said predetermined dielectric constant extending from the truncated surface of said ellipsoid to said one focal point, thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; a plurality of no less than two equal length flat conductors disposed longitudinally along and at uniform intervals about said cone commencing from said circular conductor; and a transmission line having a corresponding plurality of conductors connected to the respective extremities of said plurality of flat conductors farthest from said circular conductor.
Claim 3
Dependent Claim
18 words
The broadband antenna system as defined in claim 1 wherein said predetermined dielectric constant is greater than unity.
Claim 4
Dependent Claim
108 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of said dielectric material extending from the truncated surface of said ellipsoid to said one focal point thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; and means disposed on said cone of said dielectric lens for providing an n conductor conical transmission line from the vertex thereof to said circular conductor, n being an integer no less than two.
Claim 5
Dependent Claim
108 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of said dielectric material extending from the truncated surface of said ellipsoid to said one focal point thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; and means disposed on said cone of said dielectric lens for providing an n conductor conical transmission line from the vertex thereof to said circular conductor, n being an integer no less than two.
Claim 6
Dependent Claim
28 words
The broadband antenna system as defined in claim 3 wherein said n conductor conical transmission line includes n flat conductors having a taper from the center portion thereof.
Claim 7
Dependent Claim
20 words
The broadband antenna system as defined in claim 3 additionally including a conductive sheet extending outwards from said circular conductor.
Claim 8
Dependent Claim
153 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of said dielectric material extending from the truncated surface of said ellipsoid to said one focal point thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; n equal length flat conductors disposed longitudinally along and at uniform intervals about said cone commencing from said circular conductor where n is an integer no less than two; a TEM transmission line having n conductors connected to respective extremities of said n flat conductors farthest from said circular conductor; and means connected to said TEM transmission line for feeding said n flat conductors with signals having substantially equal phase differences from one conductor to the next adjacent conductor.
Claim 9
Dependent Claim
153 words
A broadband antenna system comprising an ellipsoid of dielectric material of predetermined dielectric constant truncated normal to the major axis thereof between one focal point and the extremity of said major axis farthest therefrom and a cone of said dielectric material extending from the truncated surface of said ellipsoid to said one focal point thereby to provide a dielectric lens; a circular conductor disposed about the periphery of said truncated surface of said ellipsoid; n equal length flat conductors disposed longitudinally along and at uniform intervals about said cone commencing from said circular conductor where n is an integer no less than two; a TEM transmission line having n conductors connected to respective extremities of said n flat conductors farthest from said circular conductor; and means connected to said TEM transmission line for feeding said n flat conductors with signals having substantially equal phase differences from one conductor to the next adjacent conductor.
Claim 10
Dependent Claim
38 words
The broadband antenna system as defined in claim 6 wherein n is an integer no less than three and saId substantially equal phase differences from one conductor to the next adjacent conductor constitutes a phase progression of 360*/n.
Claim 11
Dependent Claim
38 words
The broadband antenna system as defined in claim 6 wherein n is an integer no less than three and said substantially equal phase differences from one conductor to the next adjacent conductor constitutes a phase delay of 360*/n.
Claim 12
Dependent Claim
38 words
The broadband antenna system as defined in claim 6 wherein n is an integer no less than five and said substantially equal phase differences from one conductor to the next adjacent conductor constitutes a phase progression of 720*n.
Claim 13
Dependent Claim
38 words
The broadband antenna system as defined in claim 6 wherein n is an integer no less than five and said substantially equal phase differences from one conductor to the next adjacent conductor constitutes a phase delay of 720*/n.
References Cited (Backward Citations)
US3321763A
Cited
US3389394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |