Calibration method for free space material electromagnetic parameter test system

A calibration method, free space technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve problems such as difficulty in operation

Active Publication Date: 2014-03-12
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

During the TRL calibration process, it is necessary to move the transceiver antenna to simulate the transmission of the calibration part, and the displacement is 1/4 of the center wavelength. Therefore, a ...

Method used

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  • Calibration method for free space material electromagnetic parameter test system
  • Calibration method for free space material electromagnetic parameter test system
  • Calibration method for free space material electromagnetic parameter test system

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Embodiment 1

[0051]The invention discloses a calibration method for a free-space material electromagnetic parameter testing system. Since free-space calibration parts are difficult to realize, system errors are divided into vector-network error sources and free-space error sources, as follows figure 2 as shown, figure 2 Neutral network error sources 21, 22, free space error sources 23, 24. To get only the S contained in the material to be tested 25 11 , S 12 , S 21 , S 22 The parameter matrix and vector-network error sources can be fully calibrated by the traditional SOLT method, and the system errors are only free-space error sources after calibration. as follows image 3 shown.

[0052] image 3 middle, E 11A ,E 11B is the directional error, E 22A ,E 22B is the source mismatch error, E 21A ,E 12A ,E 12B ,E 21B is the transmission and reflection tracking error, due to the passive in free space transmission, so E 21A =E 12A ,E 12B =E 21B , so there are 6 errors in the ...

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Abstract

The invention provides a calibration method for a free space material electromagnetic parameter test system; the method is used for realizing the calibration of dual port network scattering parameter matrixes of the free space material test system by adopting a calibration method with a vector network analyzer and preset formulas. By adopting the scheme, the calibration of the free space material test system can be carried out effectively; by creating a separation error term transmission/reflection model, transceiver antennae are not needed to be moved by a precision clamp, only a simple calibration kit is used by combining a time domain gate technology, thus the calibration of the free space material electromagnetic parameter test system is completed, and the dependence on the high-precision test clamp is avoided.

Description

technical field [0001] The invention belongs to the technical field of calibration of an electromagnetic parameter test system, and in particular relates to a calibration method for a free space material electromagnetic parameter test system. Background technique [0002] With the rapid development of microwave technology, the requirements for antennas and microwave components in high-tech fields such as aviation, aerospace, communication technology and information technology have also increased, making microwave / millimeter wave materials play an increasingly important role in these fields. role. The electromagnetic parameters of materials are its basic characteristics. Whether the performance of various microwave / millimeter wave devices and equipment meets the standards has an important relationship with the electromagnetic parameters of materials. Carry out relevant tests on the materials used. [0003] At present, the commonly used methods for testing electromagnetic pa...

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Application Information

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IPC IPC(8): G01R35/00
Inventor 杜刘革赵锐殷志军刘伟常庆功王亚海
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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