Radio Antenna Assembly and Apparatus for Controlling Transmission and Reception of RF Signals

a technology of radio antennas and antenna assemblies, applied in the direction of individual energised antenna arrays, electrical devices, antenna details, etc., can solve the problems of device remote detonation, ineffective jamming signal, and receiver receiving less than desired signal strength, so as to improve the signal-to-noise ratio of communication links

Inactive Publication Date: 2009-06-04
ALLEN VANGUARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0114]In this arrangement, the apparatus has the ability to detect the presence of a phase difference between the two RF signals received by separate first and second antennas having different vertical positions. The phase difference may be used to determine positional information about

Problems solved by technology

Thus, as the vehicle moves towards an object, such as a receiver, the signal strength fades significantly when the vehicle is in close proximity with the receiver resulting in the receiver receiving less than the desi

Method used

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  • Radio Antenna Assembly and Apparatus for Controlling Transmission and Reception of RF Signals
  • Radio Antenna Assembly and Apparatus for Controlling Transmission and Reception of RF Signals
  • Radio Antenna Assembly and Apparatus for Controlling Transmission and Reception of RF Signals

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Embodiment Construction

[0148]Referring to FIGS. 1 to 3, an antenna assembly 1 comprises a first antenna 3, a second antenna5 and a support 6 for supporting the first and second antennas at an elevated position above a surface 9, when mounted on a predetermined support structure 7. In this embodiment, the support structure 7 comprises a mobile structure 11 having a peripheral edge 13. The antenna support comprises an upright member 15 upstanding from the mobile structure 11 for supporting the first and second antennas at a position above the top 17 of the mobile structure. Thus, together, the antenna support 6 and the support structure 7 support the antennas at an elevated position above the surface.

[0149]The mobile structure has opposed front and rear ends 19, 21 and opposed left and right sides 23, 25. In this embodiment, the first and second antennas are located at a position which is offset from the center 27 of the mobile support structure 11 towards the rear end 21 and towards the right side 25. In o...

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Abstract

An apparatus includes an antenna for transmitting RF radiation and being structured to enable the distribution of RF energy emitted therefrom to be varied in the vertical plane. The apparatus comprises a generator for generating an RF signal and to pass the signal to the antenna, and a controller arranged to control the distribution of RF energy emitted from the antenna in the vertical plane in response to positional information about an object.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This U.S. non-provisional patent application claims priority from U.S. Provisional Application No. 60 / 969,305 filed on 31 Aug., 2007, and from U.S. Provisional Application No. 61 / 048,421 filed on 28 Apr., 2008, the entire contents of both applications being incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to radio antennas and antenna assemblies and in particular, but not limited to, antennas and antenna assemblies for vehicles and other mobile units.BACKGROUND OF THE INVENTION[0003]Vehicle mounted radio antennas are generally known for receiving radio broadcast signals and for two-way communication in mobile telephone applications. Vehicle mounted antenna are also known for voice communications in military applications.[0004]In static applications, a known antenna assembly comprises an antenna array comprising several vertically stacked dipole antennas each of which operates over the same frequen...

Claims

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Application Information

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IPC IPC(8): H01Q3/00
CPCH01Q1/1242H01Q1/325H01Q21/08H01Q9/18H01Q3/38
Inventor BONGFELDT, DAVID CHARLESLEWIS, NICLASYENSEN, TREVOR NOEL
Owner ALLEN VANGUARD
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