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Method for achieving omni-directional coverage of wave beams of array antenna

An array antenna and beam technology, which is applied in the field of omnidirectional coverage of array antenna beams, can solve the problem that it is difficult to widen the omnidirectional beam width of array antennas

Inactive Publication Date: 2014-02-12
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the field of satellite positioning, the receiver antenna needs to be omnidirectional to receive satellite signals in all directions, thereby improving positioning accuracy, but it is difficult to widen the beam width of the array antenna to achieve omnidirectionality with traditional methods

Method used

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  • Method for achieving omni-directional coverage of wave beams of array antenna
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  • Method for achieving omni-directional coverage of wave beams of array antenna

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with drawings and embodiments.

[0028] Such as figure 1 As shown, it is a flow chart of the method for realizing the omnidirectional coverage of the array antenna beam according to the present invention. Taking five linearly arranged dipole antennas as an example, the method includes steps:

[0029] Step S1: first determine in a specific direction There is no signal transmission on the is the azimuth angle in spherical coordinates, and θ is the zenith angle in spherical coordinates; here consider three different cases, namely when θ is equal to the cases of 0°, 40° and 80°, respectively.

[0030] Step S2: Calculate and generate a virtual signal, which is expressed as: S(n)=I×exp(2πjn / N), where exp() represents the natural logarithm e as the base exponential function, I represents the strength of the signal, and N Indicates the number of sampling points of the interference signal, n is an intege...

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Abstract

The invention discloses a method for achieving omni-directional coverage of wave beams of an array antenna. The method for achieving the omni-directional coverage of the wave beams of the array antenna comprises the steps that whether signal transmission exists in a specific direction (phi and theta) is firstly determined, wherein phi is an azimuth angle in a spherical coordinate and theta is a zenith angle in the spherical coordinate; a virtual signal from the direction (phi and theta) is generated through calculation; a signal obtained by each antenna unit is calculated; the weight w of each antenna unit of the array antenna is obtained through calculation according to the power inversion and zero adjustment algorithm; the signal of each antenna unit of the array antenna is multiplied by the weight of the antenna unit; signals which are obtained after the signals of the antenna units of the array antenna are multiplied by the weights of the antenna units in last step are added. The method for achieving the omni-directional coverage of the wave beams of the array antenna has the advantages that the defect that wide wave beams can not be achieved by a traditional array antenna is overcome, and the virtual signal and the zero adjustment method of Gaussian noise are adopted to enable the wave beams of the array antenna to be omni-directional; the widths of the wave beams of the antenna are close to the widths of wave beams of a single antenna unit of the array antenna, and the gain of wave beams of the antenna is larger than the gain of the wave beams of the single antenna unit of the array antenna.

Description

technical field [0001] The invention relates to an array antenna of a wireless communication system, in particular to a method for realizing omnidirectional coverage of an array antenna beam. Background technique [0002] The array antenna composed of multiple antenna elements has many advantages. First, the array antenna can achieve high-gain, high-directivity beams, and the beam direction can be changed by adjusting the amplitude and phase difference of the excitation signal of each antenna element. This feature of the array antenna makes it widely used in various fields, such as 3G and 4G mobile communication networks, satellite communication, and radar. Secondly, the array antenna can control the zero point of the antenna pattern to eliminate strong interference signals, which is the so-called zeroing antenna. This technology is applied in the field of satellite communication to improve the anti-interference ability of the receiver. [0003] In the field of satellite po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/00
Inventor 彭政谕冉立新皇甫江涛
Owner ZHEJIANG UNIV
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