Electromagnetic field near-field testing method, system, readable storage medium and computer equipment

Abstract

The present application is applicable to the field of testing, and provides an electromagnetic field near-field testing method, system, computer-readable storage medium, and computer equipment. The method includes: in the selected coordinate system, controlling the motion device to cause random relative motion of the DUT and the probe, generating a plurality of random measurement points, and determining one or more postures of the probe, and obtaining the corresponding postures of the probe respectively. Electromagnetic field coefficient; obtain the measured values ​​of the electromagnetic field signals collected by all probes, and obtain a set of measured values; according to the set of measured values ​​and the electromagnetic field coefficients corresponding to the attitude of the probe, according to the Lorenz reciprocity law in electromagnetism, and through convex optimization The algorithm solves the electromagnetic field coefficient of the DUT; according to the electromagnetic field coefficient of the DUT, the far field pattern of the DUT or the electric field and / or magnetic field at any point outside the DUT is obtained. This application requires much less measurement points than the traditional algorithm, which greatly improves the test efficiency, and the calculation range of the DUT electromagnetic field is wider than that of the traditional method.

Description

technical field [0001] The present application belongs to the field of testing, and in particular, relates to an electromagnetic field near-field testing method, system, computer-readable storage medium, and computer equipment. Background technique [0002] The traditional electromagnetic field near-field test methods include: plane near-field test method, cylindrical near-field test method and spherical near-field test method. These near-field test methods discretize the Lorenz reciprocity theorem in the physical equations in a plane coordinate system, a cylindrical coordinate system, and a spherical coordinate system, so that the variables to be determined (such as DUT (Device Under Test, object to be measured) ) of the plane wave coefficient, cylindrical wave coefficient or spherical wave coefficient) and the measured value collected by the probe have a Fourier transform relationship, which makes the measurement point of the probe fixed on the sampling plane, sampling cyl...

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Problems solved by technology

[0003] The purpose of this application is to provide an electromagnetic field near-field test method, system, computer-readable storage medium and computer equipment, aiming to solve the problem that when the operating frequency of the DUT increases, the total number of measurement points required by the traditional electromagnetic field near-field test method will be reduced. As the square of the working frequency increases proportionally, the test efficiency also decreases proportionally to the square of the working frequency, which greatly limits the problem of its test efficiency in high-frequency scenarios

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