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Wave-absorbing material dielectric parameter measurement and inversion method based on open-circuit coaxial line

A technology of absorbing materials and dielectric parameters, applied in the direction of dielectric property measurement, measuring devices, measuring electrical variables, etc., can solve problems such as failure to meet accuracy requirements, and achieve low-cost effects

Pending Publication Date: 2021-07-16
中国电波传播研究所
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Problems solved by technology

However, with the development of technology, the requirements for the accuracy of the electromagnetic system continue to increase, and the simple DC equivalent test method can no longer meet the accuracy requirements for the electrical parameter testing of wave-absorbing materials in related fields.

Method used

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  • Wave-absorbing material dielectric parameter measurement and inversion method based on open-circuit coaxial line
  • Wave-absorbing material dielectric parameter measurement and inversion method based on open-circuit coaxial line
  • Wave-absorbing material dielectric parameter measurement and inversion method based on open-circuit coaxial line

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Embodiment 1

[0031] Embodiment 1. This embodiment discloses a method for measuring and inverting the dielectric parameters of a wave-absorbing material based on an open-circuit coaxial line, including the following steps:

[0032] Step 1, equivalent circuit derivation of the calculation formula of the lossy capacitance of the medium to be tested:

[0033] The open-circuit coaxial probe can be regarded as a capacitor, and the medium to be tested can be equivalent to the product of a constant capacitance and a complex dielectric constant. The connection mode and equivalent circuit model of the coaxial probe to test the absorbing material are as follows: figure 1 , as shown in 2, in figure 1 where a and b are the radii of the inner conductor and outer conductor of the coaxial probe respectively. figure 2 Middle C t Represents the capacitance component that has nothing to do with the measured dielectric parameters, that is, the capacitance caused by the edge effect, C yp is the capacitanc...

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Abstract

The invention discloses a wave-absorbing material dielectric parameter measurement and inversion method based on an open-circuit coaxial line. The method comprises the following steps: step 1, deducing a calculation formula for the power consumption capacity of a medium to be measured in an equivalent circuit; step 2, calibrating a measurement reference surface; and step 3, measuring and inverting the dielectric parameter of the wave-absorbing material. The wave-absorbing material dielectric parameter measurement and inversion method based on the open-circuit coaxial line can be used for replacing a traditional direct-current equivalent resistance testing method, electrical parameter measurement of the wave-absorbing material can be carried out more accurately, parameter calibration of various wave-absorbing materials can be carried out accurately, and more accurate electrical parameter guidance is provided for design and model selection of electromagnetic systems such as radar stealth, electromagnetic shielding and radio frequency matching. Meanwhile, the method is a relatively simple and low-cost method for measuring and inverting the dielectric parameters of the wave-absorbing material.

Description

technical field [0001] The invention belongs to the field of radar stealth, electromagnetic shielding and radio frequency matching, and particularly relates to a method for measuring and inverting the dielectric parameters of a wave-absorbing material based on an open-circuit coaxial line in this field. Non-destructive testing methods for dielectric parameters of materials. Background technique [0002] Electromagnetic absorbing materials are widely used in the fields of radar stealth, electromagnetic shielding and radio frequency matching, and have become an indispensable important material and component of current complex electronic systems. In the field of radar technology, absorbing materials are mainly used to absorb incoming waves and reduce the reflection of electromagnetic wave signals to achieve the purpose of stealth. It is an indispensable and important component of stealth electronic equipment. In complex electronic systems such as large-scale equipment such as ...

Claims

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Application Information

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IPC IPC(8): G01R27/26G06F17/11
CPCG01R27/2617G06F17/11
Inventor 李少龙张照王君超任强王蕾
Owner 中国电波传播研究所
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