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Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna

A technology of radio frequency identification and electronic tags, which is applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as inability to test, and achieve the effect of improving reliability and reducing production costs

Inactive Publication Date: 2011-08-24
HANGZHOU RFID RES CENT CHINESE ACAD OF SCI +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In order to reduce the cost of large-scale production of tags and overcome the disadvantage that the tag online testing method cannot be tested before the tag antenna is attached to the chip, the patent of the present invention provides an ultra-high frequency (UHF) radio frequency identification (RFID) electronic tag (Tag) antenna large The large-scale production online test method can accurately test the input impedance of the tag antenna before the tag is attached to the chip, reducing the cost of the tag, and the patent of the invention is suitable for testing various types of tag antennas

Method used

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  • Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna
  • Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna
  • Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna

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Embodiment Construction

[0013] figure 1 It is a principle block diagram of a single UHF tag antenna impedance line testing method.

[0014] The equipment system used for testing the impedance line of a single UHF tag antenna includes a central processing unit, a microwave signal source, a multi-port (probe) power measurement system, a balanced transformer balun, and capacitively coupled probes. The needle is connected to the multi-port (probe) power measurement system through the balun, and the central processing unit provides signals to the multi-port (probe) power measurement system through the microwave signal source. The equipment is also equipped with a power module, a buzzer, and a display. The power module provides power to the entire system, and the buzzer and the display are respectively connected to the central processing unit. The microwave signal source is controlled by the central processor, which can realize frequency hopping or frequency sweeping. In order to measure the wide applica...

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Abstract

The invention relates to an online testing method for mass production of UHF identification electronic tag antenna. The testing method comprises the following steps: firstly, performing capacitive-coupling on a metal small disc of a probe end and a pad of a tag antenna where the chip is pasted; secondly, performing balance-unbalance and impedance conversion of a signal coupled by the probe via compensation Barron; thirdly, sampling and extracting the power information of several fixed points on a slot line of the signal converted by the compensation Barron via the slot reflectometer principle; and finally, acquiring a reflection coefficient loaded by a port by using the acquired power information of the several points via calculation so as to calculate the input impedance of the tag antenna. The method has the advantages that the input impedance of the tag antenna is measured before the chip is pasted, the production cost is effectively reduced, the matching degree between the tag antenna and the chip is reflected precisely, and the method is suitable for testing various types of tag antennas.

Description

Technical field [0001] The present invention is an online testing method for ultra-high frequency (UHF) radio frequency identification (RFID) tag antennas. On the label, so as not to paste the chip, in order to reduce production costs and improve the reliability of large-scale production of labels. Background technique [0002] At present, the mass-production testing method of electronic tags (Tags) adopts the method of attaching a chip to the produced tag antenna, and then using an external field (radiation field) test on the entire electronic tag, such as TEM Cell. The disadvantage of this type of method is that: on the one hand, the input impedance of the tag antenna cannot be accurately measured, nor can it accurately reflect the radiation efficiency of the antenna; costs will be greatly increased. The patent of the invention directly tests the input impedance of the tag antenna online, before the tag is attached to the chip, which can effectively reduce the production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
Inventor 尹应增崔恒荣徐明陆云龙孙晓玮
Owner HANGZHOU RFID RES CENT CHINESE ACAD OF SCI
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