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Omnidirectional volumetric antenna

A technology of omni-directional antennas and conductive elements, which is applied in the direction of antennas, resonant antennas, and mid-position feeds between antenna endpoints, and can solve problems such as direction subsets affecting orientation

Inactive Publication Date: 2010-03-24
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] State-of-the-art omnidirectional antennas can have good omni-directional guidance on an azimuthal plane, but are not free to optimally affect guidance on a subset of directions

Method used

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  • Omnidirectional volumetric antenna
  • Omnidirectional volumetric antenna
  • Omnidirectional volumetric antenna

Examples

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Embodiment Construction

[0030] In general, the antenna according to the invention comprises a conical first conductive element and a likewise conductive second element which may also be conical or planar. The combination of these two elements is coupled to a coaxial center excitation line. Said excitation line consists of a metal central rod which ensures the power supply function of the antenna forming a short circuit at the height of the opening between the two conducting elements in order to enable a coaxial type connection and the combination of these two conducting elements to be coupled. The short circuit is realized by setting an "open circuit" at a distance of λ / 4 from the end of the metal rod. The height beyond the end of the central rod is also an adaptable tuning parameter of the antenna.

[0031] image 3 An example of the omnidirectional antenna structure is described in detail, including more particularly, a first cone element C c1 , a second cone element C c2 , and a coaxial centra...

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PUM

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Abstract

The invention relates to a wide-band omnidirectional antenna including at least a first conducting member (Cc1) and a second conducting member (Cc2) having a revolution symmetry about a common revolution axis and central openings (O1, O2), the members being arranged opposite each other, at least one member having a progressively flaring area, the invention is characterized in that the antenna comprises a gap between the conducting members and a central coaxial excitation line (Lc) so as to achieve a three-dimensional contactless transition between the coaxial excitation line and the conductingmembers and members for modifying the radiation pattern in the flaring area (Ri) of the diode type for selectively radiating the gap depending on the on- or off-state of the diodes.

Description

technical field [0001] The field of the invention relates to omnidirectional stereoscopic antennas, such as biconical or disc-conical antennas, whose angular azimuthal space can be partitioned by adding elements to their radiation pattern forming regions. Background of the invention [0002] Usually, the biconical antenna is placed with the tips of two cones facing each other, and the power supply passes through the center of the cone. The shape of the cone defines a tapering zone from which the wave propagates. The tapered area has different shapes and provides a specific profile, such as those of "Vivaldi" type antennas with a hemispherical profile, which can also be reduced to a single line. The disc cone antenna (discone antenna) is realized by setting a cone on the reflection plane, and this combination shows the same characteristics as the two-way antenna significantly in terms of efficiency. [0003] Known omni direct ional antennas include such as figure 1 Cone C ...

Claims

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Application Information

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IPC IPC(8): H01Q3/24H01Q9/28H01Q19/00H01Q23/00
CPCH01Q19/00H01Q9/28H01Q3/247H01Q23/00
Inventor 朱利安·特维纳德多米尼克·罗海因汤阿利·洛齐尔科琳·尼古拉斯克里斯琴·珀森让-菲利普·库佩兹
Owner THOMSON LICENSING SA