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A microwave complex dielectric constant test system for high loss liquid and powder materials

A technology of complex dielectric constant and powder materials, which is applied in the field of complex dielectric constant test systems for high-loss liquids and powder materials, can solve problems such as cavity flooding, and achieve the effect of reducing requirements, good performance, and low requirements

Active Publication Date: 2017-12-12
成都恩驰微波科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the loss of the material to be tested is relatively large, the resonance peak of the cavity is submerged, and the test is terminated.

Method used

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  • A microwave complex dielectric constant test system for high loss liquid and powder materials
  • A microwave complex dielectric constant test system for high loss liquid and powder materials
  • A microwave complex dielectric constant test system for high loss liquid and powder materials

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Embodiment Construction

[0021] Place the wine glass furniture 5 on the Open Coaxial Resonator (Open Coaxial Resonator) 1, then insert the probe into the cavity, and make it with the SMA to other coaxial connector converter 2, cable 3, vector network The analyzers 4 are connected together to realize the link of the whole system.

[0022] The specific steps for testing the electromagnetic parameters of microwave materials by using the Open Coaxial Resonator are:

[0023] Step 1: Select the test frequency range, adjust the length of the probe into the cavity through the coupling regulator to maximize the quality factor of the system at the resonant frequency point, and record the system resonant frequency f within the test range of the system loaded with any sample 0 And the quality factor Q of the corresponding frequency point 0 ;

[0024] Step 2: Put an appropriate amount of material to be tested into the wine glass furniture with a thickness of d, and test to obtain the resonant frequency f of the ...

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Abstract

The invention discloses a new microwave complex permittivity test method for high-loss liquid and powder materials, which belongs to the field of electromagnetic parameter test of microwave and millimeter wave materials, and relates to a coaxial open resonator (Open Coaxial Resonator). The method calculates the complex dielectric constant of the sample to be tested through the resonant frequency and quality factor of the coaxial open resonant cavity on which the wine glass furniture is loaded before and after loading the microwave measured material, and the thickness of the loaded sample. The test system built by this method includes six parts: Open Coaxial Resonator, probe, converter from SMA to other coaxial connectors, cable, vector network analyzer and wine glass furniture. Connect the six parts into a system, adjust the length of the probe deep into the cavity through the coupling regulator, so that the quality factor of the system at the resonant frequency point is the largest, and record the resonant frequency f0 and quality factor Q0 of the system at this time. Put the material to be tested into the wine glass furniture to ensure the flatness of the upper surface of the sample, measure the thickness d of the sample and record the resonant frequency f1 and quality factor Q1 of the system after loading the sample. Calculate the complex dielectric constant of the material to be tested from the above parameters.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic parameter testing of microwave and millimeter-wave materials, and specifically relates to a complex of high-loss liquid and powder materials composed of a coaxial open resonator (Open Coaxial Resonator) and polytetrafluoroethylene wine glass furniture. Dielectric constant test system. Background technique [0002] As an electromagnetic wave transmission medium, microwave materials have been widely used in various microwave fields, such as microwave circuits, communications, missile guidance, electronic countermeasures, radar stealth, remote sensing and telemetry, etc. The electromagnetic parameters of dielectric materials generally refer to complex permittivity and complex permeability, usually in the form of complex numbers ε(jω)=ε′(jω)-jε″(jω), μ(jω)=μ′(jω)-jμ ″(jω) means that it is the two most basic characteristic parameters describing the interaction between materials and electromagn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
Inventor 李恩韩利存郭高凤高源慈郑虎陶冰洁
Owner 成都恩驰微波科技有限公司
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