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Spherical near-field phase measurement method and system based on cubic spline interpolation algorithm

A spline interpolation and phase measurement technology, applied in the field of antennas, can solve the problems of difficult measurement of near-field phase and insufficient information of near-field phase, and achieve the effect of overcoming the lack of information

Pending Publication Date: 2021-10-29
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In view of the above problems in the prior art, the purpose of this paper is to provide a lightweight network middleware architecture system and satellite communication method, which can effectively solve the technical problem that the near-field phase is difficult to measure in the spherical near-field measurement, and overcome the near-field phase Technical challenges of insufficient information

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  • Spherical near-field phase measurement method and system based on cubic spline interpolation algorithm
  • Spherical near-field phase measurement method and system based on cubic spline interpolation algorithm
  • Spherical near-field phase measurement method and system based on cubic spline interpolation algorithm

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[0052] The following will clearly and completely describe the technical solutions in the embodiments herein in conjunction with the accompanying drawings in the embodiments herein. Obviously, the described embodiments are only some of the embodiments herein, not all of them. Based on the embodiments herein, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the scope of protection herein.

[0053] It should be noted that the terms "first" and "second" in the description and claims herein and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments herein described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations ...

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Abstract

The invention particularly relates to a spherical near-field phase measurement method and system based on a cubic spline interpolation algorithm. The method comprises the following steps: acquiring first near-field amplitude data and second near-field amplitude data of a radiation near-field region of a test antenna; obtaining first interpolation amplitude data and second interpolation amplitude data by using a cubic spline interpolation algorithm; calculating the iterative field distribution of the first spherical surface based on the first interpolation amplitude data, and calculating the initial iterative field distribution of the second spherical surface based on the iterative field distribution of the first spherical surface; based on the initial iteration field distribution, after amplitude substitution, obtaining iteration field distribution of a first spherical surface through spherical mode expansion, wherein the iteration field distribution of the first spherical surface contains to-be-verified amplitude data obtained through calculation; calculating an error value between the first near-field amplitude data and the to-be-verified amplitude data; and if the error value is smaller than the preset value, outputting the restored electric field phase distribution of the first spherical surface. The technical problem that the near-field phase is difficult to measure in spherical surface near-field measurement is effectively solved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a spherical near-field phase measurement method and system based on a cubic spline interpolation algorithm. Background technique [0002] With the development of communication technology and the increase of antenna size, the conditions for antenna far-field measurement cannot be satisfied more and more, and the near-field measurement of antenna plays a vital role. Near-field antenna measurement The near-field amplitude and phase of the near-field antenna are measured in a small microwave anechoic chamber, and the far-field data of the antenna are obtained indirectly through a strict near-far field conversion algorithm. Such a measurement method occupies a small area and isolates external interference. However, as the operating frequency of the antenna increases, the measurement of the antenna phase becomes more and more difficult, and more stringent and expensive measurement eq...

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Application Information

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IPC IPC(8): G01R29/10G01R29/08
CPCG01R29/10G01R29/0892
Inventor 王卫民王佳鑫吴永乐
Owner BEIJING UNIV OF POSTS & TELECOMM
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