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Method for forming circular array antenna digital wave beams

An array antenna and digital beam technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as antenna gain angle measurement accuracy, planar array antennas cannot cover at the same time, and antenna beam width increase

Inactive Publication Date: 2011-06-01
WUHAN BINHU ELECTRONICS
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the present invention provides a circular array antenna digital beamforming method, the purpose is to overcome the problems existing in the prior art, solve the problem that the planar array antenna cannot cover 360 at the same time, and the antenna beam width increases with the scanning angle. Increase and the problem that the antenna gain and angle measurement accuracy decrease with the increase of scan angle

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  • Method for forming circular array antenna digital wave beams
  • Method for forming circular array antenna digital wave beams
  • Method for forming circular array antenna digital wave beams

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] A circular array antenna digital beamforming method provided in an embodiment of the present invention includes:

[0030] (1) circular array antenna;

[0031] (2) Receiving processing, after the radio frequency signal received by the circular array antenna undergoes multiple frequency conversions, an intermediate frequency signal is output;

[0032] (3) A / D conversion, carry out analog-to-digital conversion to the intermediate frequency signal after receiving and processing to obtain a digital signal:

[0033] x nT (i)=S(i)·f(nT),

[0034] where x nT (i) is the digital signal after analog-to-digital conversion, x nT (i) is the analog signal received by the circular array, x nT (i) is a sampling signal, and T is a sampling period;

[0035] (4) Digital quadrature down-conversion, the digital signal after A / D conversion is changed i...

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Abstract

The invention provides a method for forming circular array antenna digital wave beams. Part of adjacent arrays in a circular array consisting of a plurality of arrays form a small circular array, a main wave beam extending outward along the centre of a circle is formed in the normal direction of the arrays in the center of the circular array, so that a circular array can be constructed by taking every array as a center so as to form a wave beam extending outward along the center of the circle, and the whole circular array can form a plurality of wave beams at equal intervals, which cover the 360-degree space; thus the circular array antenna digital wave beams are formed. The method solves the problems of the prior art, and the problems that a planar array antenna cannot simultaneously cover the 360-degree space, and the antenna beamwidth is increased along with the increment of a scanning angle and the antenna gain and angle measurement accuracy are reduced along with the increment of the scanning angle.

Description

technical field [0001] The invention relates to a digital signal processing method and a circuit thereof, in particular to a circular array antenna digital beam forming method. Background technique [0002] At present, the phased array antenna is basically a planar array antenna. The planar array antenna has some disadvantages. The beam coverage is narrow, limited to within 120°. The antenna beam width increases with the increase of the scanning angle. The angle increases and decreases. The mutual coupling effect between the antenna elements is a function of the scan angle, and the standing wave of the antenna element changes with the increase of the scan angle. It is difficult to achieve wide-angle scan matching, and the antenna sidelobe level often increases with the increase of the scan angle. [0003] Therefore, it is necessary to design a circular array antenna digital beamforming method that can overcome the above shortcomings to meet the needs of industrial applicati...

Claims

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Application Information

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IPC IPC(8): H04B7/04
Inventor 吴军沈小川
Owner WUHAN BINHU ELECTRONICS
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