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Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method

A technology of dielectric coefficient and solid powder, which is used in the test of dielectric coefficient of liquid or solid powder material, and the field of dielectric coefficient measurement device of liquid or solid powder material, which can solve the problems of expensive and difficult to accurately measure the phase of reflection coefficient. , to achieve the effect of simple measurement system

Inactive Publication Date: 2007-11-28
SICHUAN UNIV
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AI Technical Summary

Problems solved by technology

However, to measure the amplitude and phase of the reflection coefficient at the same time, an expensive microwave vector network analyzer must be used, and it is often difficult to accurately measure the phase of the reflection coefficient when studying the dielectric properties of materials under the action of high-power microwaves

Method used

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  • Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method
  • Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method
  • Liquid or solid powder substance dielectric coefficient test device, and the test and calculation method

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Embodiment

[0034] The dielectric coefficient test device of liquid or solid powder material is composed of microwave signal source 1, through circulator 2, double directional coupler 3 to the input end of slotted coaxial measurement section 4, and the reflected wave Pr and transmitted wave are generated after passing through the measured material Pt, the reflected wave Pr is transmitted to the matching load 6 by the double directional coupler 3 and the circulator 2, and the transmitted wave Pt is connected to the matching load 6 through the directional coupler 5. 3. The coupled incident wave Pi, reflected wave Pr and transmitted wave Pt coupled by the directional coupler 5 are respectively connected to the dual-channel power meter 7 and sent to the computer 8 to form a whole.

[0035] The slotted coaxial measuring section 4 is provided with a measuring container 12, the measuring container is provided with a slotted coaxial line 9, the slotted coaxial line passes through the measuring con...

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Abstract

The invention relates to a testing device for dielectric coefficient of liquid or solid powder matter and testing and calculating methods, characterized in that in the device microwave signal source (1) is connected to the inputting end of slotting coaxial measurement segment (4) by circulator (2) and double directional coupler (3); after it passes through tested matter reflecting wave Pr and transmitting wave Pt are generated; reflecting wave Pr is transferred to matched load (6) by the double directional coupler (3) and the circulator (2); transmitting wave Pt is sent to the matched load (6) by directional coupler (5); incident wave Pi and reflecting wave Pr coupled by the double directional coupler (3) and transmitting wave Pt coupled by directional coupler (5) sent to double-channel power meter (7) respectively at two ends of slotting coaxial measurement segment (4) are sent to computer (8) finally so as to form an integration. It is tested and calculated by the following method. Tested matter is set in the measuring container (12) and amplitudes of reflection coefficient S11 and transmission coefficient S21 are read in computer (8) as testing value for use. Based on testing result dielectric coefficient of tested matter is searched by finite value algorithm combined with genetic algorithm.

Description

technical field [0001] The invention relates to a device for measuring the dielectric coefficient of liquid or solid powder materials and its testing and calculation method, which is especially suitable for testing the dielectric coefficient of liquid or solid powder materials under high-power microwaves, and belongs to the field of testing the dielectric coefficient of materials. Background technique [0002] The dielectric coefficient of matter has always been a fundamental and important issue in the study of the interaction between matter and microwaves. Knowing the dielectric coefficient of various substances can further understand its absorption and reflection of microwaves. The traditional resonant cavity method is difficult to meet the requirements of broadband on-line measurement due to the narrow measurement frequency band of a single resonant cavity; the traditional transmission line method uses a standard coaxial line or waveguide, which has high requirements on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/00G01R31/12G06F17/00
Inventor 黄卡玛杨晓庆华伟赵翔
Owner SICHUAN UNIV
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