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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 more precise mechanical fixture is required to adjust the distance of the transceiver antenna, and the higher the frequency, the higher the accuracy requirements and the more convenient the operation. difficulty

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...

Claims

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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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