Claims
- 1. A domed divergent microwave lens including a plurality of waveguides with various lengths, the greatest length being that on the axis of said lens and the length being shorter for waveguides far from said axis.
- 2. The divergent lens claimed in claim 1 wherein said axes of said waveguides are all parallel to each other and parallel to said axis of said lens.
- 3. The divergent lens claimed in claim 1 wherein said axes of said waveguides converge at a point on said axis of said lens.
- 4. The divergent lens claimed in claim 1 in the form of a body of revolution about an axis.
- 5. The lens claimed in claim 1 wherein all said metal waveguides have the same section, for example a circular, rectangular or hexagonal section.
- 6. A send or receive antenna for a telecommunication system using non-geosynchronous satellites, said antenna being intended to form a set of fixed beams on the ground extending over a total angle of view from 60 to 120°, said antenna including an array of radiating elements scanned electronically to form beams corresponding to the various terrestrial areas and a domed divergent lens for enlarging the aperture of the beams created by said array of radiating elements and producing a gain that is at a minimum on said axis of said antenna and at a maximum at the periphery of said antenna, wherein said divergent lens includes a plurality of metal waveguides with various lengths, the greatest length being that on said axis of said lens and the length being shorter for waveguides far away from said axis.
- 7. The antenna claimed in claim 6 wherein said waveguides of said domed divergent lens have axes parallel to each other and parallel to said axis of said lens.
- 8. The antenna claimed in claim 6 wherein said axes of said waveguides converge at a point on said axis of said lens and in a plane of said array of radiating elements.
- 9. The antenna claimed in claim 6 wherein said waveguides of said domed divergent lens all have the same section, for example a circular, rectangular or hexagonal section.
- 10. The antenna claimed in claim 6 wherein said array of radiating elements includes the same number of waveguides as said domed divergent lens.
- 11. The antenna claimed in claim 10 wherein said radiating elements of said array of radiating elements each include a waveguide in one piece with a waveguide of said domed divergent lens.
- 12. The antenna claimed in claim 11 wherein said waveguides of said array of radiating elements are extended by one or more sections for filter means on the side opposite said waveguides of said divergent lens.
Priority Claims (1)
Number |
Date |
Country |
Kind |
00 12 162 |
Sep 2000 |
FR |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is based on French Patent Application No. 00 12 162 filed Sep. 25, 2000, the disclosure of which is hereby incorporated by reference thereto in its entirety, and the priority of which is hereby claimed under 35 U.S.C. §119.