Near-field testing method and system for electromagnetic field, readable storage medium and computer equipment

Abstract

The invention is suitable for the field of testing, and provides a near-field testing method and system for an electromagnetic field, a computer readable storage medium and computer equipment. The method comprises the following steps: in a selected coordinate system, controlling a motion device to enable a DUT and probes to generate random relative motion, generating a plurality of random measurement points, determining one or more postures of the probes, and acquiring electromagnetic field coefficients respectively corresponding to the postures of the probes; acquiring electromagnetic field signal measurement values collected by all the probes so as to obtain a measurement value set; solving the electromagnetic field coefficient of the DUT through a convex optimization algorithm according to the measured value set and the electromagnetic field coefficients corresponding to the postures of the probes and the Lorentz reciprocity law in electromagnetism; and acquiring a far-field pattern of the DUT or an electric field and / or a magnetic field of any point outside the DUT according to the electromagnetic field coefficient of the DUT. Measurement points required by the method are much fewer than measurement points required by a traditional algorithm, test efficiency is greatly improved, and the calculation range of the DUT electromagnetic field is wider than the calculation range of a 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] Traditional electromagnetic field near-field test methods include: planar near-field test method, cylindrical near-field test method and spherical near-field test method. These near-field test methods are to discretize the Lorenz reciprocity theorem in the physical equation in the plane coordinate system, cylindrical coordinate system and spherical coordinate system respectively, so that the variables to be obtained (such as DUT (Device Under Test, the object under test, ) plane wave coefficient, cylindrical wave coefficient or spherical wave coefficient) and the measurement value collected by the probe have a Fourier transform relationship, which makes the measurement point of the probe fixed on the sampling plane, samplin...

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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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