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Method for constructing thinned MIMO (Multiple Input Multiple Output) planar array radar antenna

A planar array and radar antenna technology, applied in the field of MIMO radar and radar array antenna, radar, can solve the problem of a large number of antenna elements of planar array antenna

Active Publication Date: 2013-06-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that a planar array antenna needs a large number of antenna elements, the present invention proposes a sparse MIMO planar array radar antenna construction method by using Phase Center Approximation (PCA, Phase Center Approximation) and MIMO technology

Method used

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  • Method for constructing thinned MIMO (Multiple Input Multiple Output) planar array radar antenna
  • Method for constructing thinned MIMO (Multiple Input Multiple Output) planar array radar antenna
  • Method for constructing thinned MIMO (Multiple Input Multiple Output) planar array radar antenna

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Experimental program
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Embodiment Construction

[0106] Step 1. Initial setting of antenna related parameters

[0107] First, determine the size parameters of the virtual planar array. Lateral angular resolution of a given planar array antenna and longitudinal angular resolution The radar signal carrier wavelength λ=0.03m. Calculate the lateral length of a virtual planar array and lengthwise

[0108] Second, determine the horizontal spacing and vertical spacing between elements of the virtual planar array. d vx Indicates that the vertical spacing between elements of the virtual planar array is denoted by d vy express. It is stipulated that the maximum beam angles scanned along the x and y directions are respectively with According to the grating lobe formula 0 d vx ≤ λ 1 + | sin θ x ...

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Abstract

The invention provides a method for constructing a thinned MIMO (Multiple Input Multiple Output) planar array radar antenna, which is on the basis of a phase center approximation principle and combines an MIMO antenna thought. The antenna arrangement optimal design is carried out by adopting the MIMO antenna thought. When all transmitting array elements simultaneously (or in turns) transmit orthogonal signals and receiving array elements simultaneously receive echo signals, a virtual planar array with uniform intervals is subjected to equivalence processing by utilizing the phase center approximation principle. According to the thinned MIMO planar array radar antenna constructed according to the invention, few transmitting antenna array elements and few receiving antenna array elements can be adopted and the equivalent full-array-element arrangement planar antenna array is virtually realized. Compared with the planar array antenna which is the same size as the equivalent virtual planar array and is directly arranged, the thinned MIMO planar array radar antenna constructed according to the method disclosed by the invention has the advantage of greatly reducing the requirement on the number of the array elements.

Description

Technical field: [0001] The invention belongs to the technical field of radar, and in particular relates to the technical field of MIMO radar and radar array antenna. technical background: [0002] MIMO (Multiple-Input Multiple-Output) technology was first proposed by Bell Labs, and has been widely used in the field of wireless communication, effectively improving wireless coverage and data transmission performance. MIMO radar is a new radar system proposed at the beginning of this century. Compared with traditional radar, MIMO radar makes more use of the resources of the transmitting array, and obtains waveform diversity gain by transmitting uncorrelated or partially correlated multi-waveforms; It is also possible to arrange the large array elements of the receiving and transmitting antenna elements at intervals, so that the emitted electromagnetic waves can irradiate the target from different angles, thereby obtaining space diversity gain. [0003] According to the invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张晓玲向高师君
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA