OMNIDIRECTIONAL VOLUMETRIC ANTENNA

• US 20120068903A1
• Filed: 06/04/2008
• Published: 03/22/2012
• Est. Priority Date: 06/12/2007
• Status: Active Grant

• Current Assignee: Thomson Licensing (Vantiva SA)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Thevenard, Julian, Tong, Dominique Lo Hine, Louzir, Ali, Nicolas, Corinne, Coupez, Jean-Philippe
• Granted Patent: US 11,271,316 B2
• Time in Patent Office: Days
• US Class Current: 343/795
• CPC Class Codes: H01Q 19/00 Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic combination of horns with slotted waveguide array H01Q13/0233
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 3/247 by switching different parts of a primary active element
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00

Abstract

The invention relates to a wide-band omnidirectional antenna including at least a first conducting member and a second conducting member having a revolution symmetry about a common revolution axis and central openings, said members being arranged opposite each other, at least one member having a progressively flaring area, characterised in that it comprises a gap between the conducting members and a central coaxial excitation line so as to achieve a three-dimensional contactless transition between the coaxial excitation line and the conducting members and members for modifying the radiation pattern in the flaring area of the diode type for selectively radiating the gap depending on the on- or off-state of said diodes.

Claims

1. Wide band omnidirectional antenna comprising at least a first conductor element and a second conductor element having a rotational symmetry around a common rotational axis and central openings, said elements being positioned facing each other, at least one of the elements having a progressive tapering zone wherein it comprises:

a central coaxial excitation line and a space between the two conductor elements so as to realize a contact free transition in three dimensions between the coaxial excitation line and the conductor elements, and

radiation pattern modifier elements in the tapering zone.

2. Wide band omnidirectional antenna according to claim 1, wherein one of the conductor elements is plane.

3. Wide band omnidirectional antenna according to claim 1, wherein at least one of the conductor elements is a cone.

4. Wide band omnidirectional antenna according to claim 3, wherein the smallest diameter of the cone is of bigger dimension than the section of the coaxial excitation line.

5. Wide band omnidirectional antenna according to claim 1, wherein at least one of the conductor elements is a half-sphere.

6. Wide band omnidirectional antenna according to claim 1, wherein the modifier elements comprise diodes able to switch from a conducting state to an insulating state or MEMS type components.

7. Wide band omnidirectional antenna according to claim 1, wherein at least one of the conductor elements comprises radial insulating sectors supporting the modifier elements.

8. Wide band omnidirectional antenna according to claim 1, wherein at least one of the conductor elements comprising radial insulating sectors is in plastic and comprises metallized parts.

9. Wide band omnidirectional antenna according to claim 8, wherein the modifier elements are supplied by a track printed directly on the plastic element comprising the metallized parts.

10. Wide band omnidirectional antenna according to claim 1 comprising metal rods connecting the two conductor elements so as to assure an earth continuity.

11. Wide band omnidirectional antenna according to claim 1, comprising at least one insulating plane piece in which is realized a conductor element having a progressive tapering zone.