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Method for testing impedance of RFID tag antenna

An RFID tag and antenna impedance technology, applied in the field of RFID tag antenna impedance testing, can solve problems such as difficulty in testing RIFD tag antenna performance parameters, and achieve accurate RFID tag antenna impedance, simple test methods, and strong practical applicability.

Active Publication Date: 2021-02-23
10TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims at the problem of difficulty in testing RIFD tag antenna performance parameters, and aims to overcome the deficiencies of the prior art, and provide a fast, simple, and relatively accurate method for testing RFID tags that can obtain the tested RFID tag antenna impedance.

Method used

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  • Method for testing impedance of RFID tag antenna
  • Method for testing impedance of RFID tag antenna
  • Method for testing impedance of RFID tag antenna

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Embodiment Construction

[0015] refer to figure 1 . According to the present invention, at first prepare the test fixture of a double port to single port, secondly carry out self-calibration to vector network analyzer; Connect test fixture on vector network analyzer, the extension structure of test fixture and vector network analysis are analyzed Connect the instrument together, establish a two-port differential test model instead of the traditional antenna impedance test single-port test model, and perform self-calibration on the vector network analyzer again, and realize port migration; then perform two open-circuit and short-circuit calibrations on the RFID tag antenna Mode of impedance matching measurement, get the tested RFID tag antenna impedance, choose the two modes to measure the average value of impedance, complete a series of calibration and port migration, weld the tag antenna to be tested with the test fixture, from the vector network analysis The relevant S parameters needed are obtaine...

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Abstract

The invention discloses a method for testing the impedance of an RFID tag antenna, and aims to provide a method for rapidly, simply and accurately testing the impedance of the RFID tag antenna. According to the technical scheme, the method comprises the steps that firstly, a vector network analyzer is calibrated, a test fixture is connected to the vector network analyzer, a dual-port differentialtest model is established to replace a single-port test model of a traditional antenna impedance test, and an extension structure is connected with the vector network analyzer through a coaxial line;the two modes of open-circuit calibration and short-circuit calibration are measured, and an average value of the two modes is selected; after a series of calibration and port migration are completed,the to-be-tested tag antenna is welded with the test fixture, required related test S parameters are obtained from the vector network analyzer, data are exported to simulation calculation mathematical software Matlab for data processing, and tested antenna impedance is obtained.

Description

technical field [0001] The invention relates to a radio frequency identification (RFID) (Radio Frequency Identification) anti-metal microstrip tag antenna tag testing method, in particular to a method for testing the RFID tag antenna impedance. Background technique [0002] With the continuous development and growth of the RFID industry, the application range of RFID tags is becoming wider and wider, the application and demand for RFID tags are also increasing, and the requirements for RFID tags are becoming more and more stringent. RFID radio frequency identification is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology relies on electromagnetic waves and does not require physical contact between the two parties. This allows it to establish a connecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R31/52G01R31/54G01R35/00G06K19/07
CPCG01R27/02G01R31/54G01R31/52G01R35/005G06K19/0722
Inventor 邓欣袁红刚娄宁何华武闫善勇
Owner 10TH RES INST OF CETC
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