Method for testing material electromagnetic parameter based on artificial magnetic conductor rectangular waveguide

Abstract

The invention provides a method for testing material electromagnetic parameters based on an artificial magnetic conductor rectangular waveguide, and belongs to the technical field of material electromagnetic parameter test methods. The method comprises: using a vector network analyzer to test S parameters of two input (output) ports of a rectangular waveguide based on artificial magnetic conductors, the rectangular waveguide being provided with a to-be-tested medium material, the S parameters comprising a first reflection characteristic S11 and second reflection characteristic S22, a first transmission characteristic S12 and a second transmission characteristic S21; and then using the following formula to calculate relative dielectric constant and relative permeability of the material. The rectangular waveguide based on the artificial magnetic conductors can transmit electromagnetic waves whose frequency is as low as frequency of DC. The method has at least two advantages when being used in tests of material electromagnetic parameters: first, electromagnetic parameters of the materials can be obtained in a very wide frequency range, and second, volume of a tested material can be greatly reduced.

Description

technical field [0001] The invention relates to a material electromagnetic parameter test method based on an artificial magnetic conductor rectangular waveguide, and belongs to the technical field of material electromagnetic parameter test methods. Background technique [0002] The electromagnetic parameter test methods of materials mainly include coaxial probe method, transmission line method, free space method, resonant cavity method, parallel plate and inductance test method, etc. Each method has its advantages and disadvantages. Among many test methods, the transmission line method is to place the material sample to be tested in an air transmission line (rectangular waveguide or coaxial line), and test the scattering parameters (S parameters), and then calculate the transmission coefficient T and reflection coefficient Γ of the transmission line section of the medium to be measured according to the scattering equation, and finally calculate the relative complex permitti...

AI Technical Summary

Problems solved by technology

At present, the application of AMC mainly focuses on the application of antennas. For example, it is used to design the antenna floor, which can effectively reduce the profile of the antenna and improve the performance of the antenna, such as increasing the gain, improving S parameters, and realizing multi-frequency work. There are fewer applications on microwave devices

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