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Phase restoration method with cubic convergence characteristic and application

A phase and characteristic technology, which is applied in the field of phase restoration with cubic convergence characteristics, can solve the problems of lack and the accuracy of phase restoration is easily limited, and achieve the effect of improving accuracy, solving the problem of falling into a local optimal solution, and improving accuracy.

Pending Publication Date: 2022-05-13
西安电子科技大学杭州研究院
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Problems solved by technology

However, the disadvantage of this method is that this method only uses iterative Fourier transform for phase restoration, and lacks the treatment of iterative Fourier transform falling into a local optimal solution, which leads to the limitation of the accuracy of phase restoration.

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  • Phase restoration method with cubic convergence characteristic and application
  • Phase restoration method with cubic convergence characteristic and application
  • Phase restoration method with cubic convergence characteristic and application

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0051] like figure 1 , the phase restoration method with cubic convergence characteristic provided by the present invention comprises the following steps:

[0052] S10: Based on the conventional planar near-field antenna sampling technology, collect and record the electric field amplitude information on two planes with a certain distance between the antenna radiation near-field area|E d1 |with|E d2 |.

[0053] First, the position of the antenna to be tested is fixed, and the aperture surface of the antenna to be tested is kept parallel to the scanning plane through the laser rangefinder and the level, and the antenna beam is aligned with the center of the scanning plane. Then, if fig...

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Abstract

The invention discloses a phase restoration method with a cubic convergence characteristic and an application, and the method comprises the steps: collecting the amplitude sampling information of a dual-plane electric field in a radiation near-field region of a to-be-detected antenna, and carrying out the initial restoration of a phase of a sampling point through employing a global optimization algorithm, and generating an initial iteration phase; first convergence of the phase is realized; continuing to restore the phases of the sampling points by using an iterative Fourier transform algorithm to realize second convergence of the phases; after the convergence precision of the iterative Fourier transform is stable, adding a random phase into the stable reduction phase to obtain an iterative phase; continuing to restore the phase by using the iterative Fourier transform algorithm to realize third convergence of the phase; and if the preset convergence precision or iteration frequency is reached, ending phase reduction, otherwise, judging whether the convergence precision is stable, if so, returning, otherwise, continuing to use the iterative Fourier transform algorithm to reduce the phase of the sampling point. According to the method, the problem that iterative Fourier transform falls into a local optimal solution can be solved, and the phase reduction precision is further improved.

Description

technical field [0001] The invention belongs to the technical field of measurement, and further relates to a phase restoration method with cubic convergence characteristics in the technical field of electromagnetic measurement. The invention can be used to restore the phase of the electric field of the antenna in the radiation near field in the electromagnetic measurement. Background technique [0002] Electromagnetic measurement is a means to measure the electromagnetic characteristics of objects. Its purpose is to test the radiation and scattering characteristics of antennas, and to diagnose faults and guide design. Antenna measurement methods mainly include direct method and indirect method. The direct method is the far-field measurement method, and the indirect method is the near-field measurement method. Near-field antenna measurement uses a probe with known characteristics to extract the amplitude and phase distribution of the field on a certain surface in the near-fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10G01R29/08G01R29/12G01R23/16G06N3/00
CPCG01R29/10G01R29/0892G01R29/12G01R23/16G06N3/006
Inventor 洪涛岳希博姜文
Owner 西安电子科技大学杭州研究院
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