[天线][分享]Impedance Characterization of RFID Tag Antennas and Application in Tag Co-Design

Abstract－In this paper, an experimental methodology for the mxwdugr`  
characterization of the impedance of balanced RF identification 5sde  
(RFID) tag antennas is presented, and the application of the proposed iV.p5F
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method in RFID tag co-design is demonstrated. The balanced N12:{U  
tag antenna is considered as a two-port network and the "%8A:^1  
impedance of the antenna is characterized using network parameters. _nT{g  
In the measurement, the antenna is connected to the two ports /.5;in  
of a vector network analyzer through a test fixture. The influence 151tXSzLT  
of the test fixture is deembedded by using a port-extension technique gM;}#>6  
and the antenna impedance can be extracted directly from A CNfS9M_w  
the measured -parameters. z/&;{J  
The proposed method is useful in practical RFID applications BdbJ< Is  
for co-designing the RFID tag with the attached platforms for @E`?<|B}  
enhancing the tag performance. An example of co-designing 0BkV/v1Uc  
an ultra-high-frequency RFID tag with a plastic Sushi plate is Mu_i$j$vvP  
demonstrated. The co-designed tag antenna achieves conjugate _baYn`tFw-  
matching with the application-specific integrated circuit so that !Q-wdzsp?  
the reading range of the RFID tag is greatly enhanced. M/V(5IoP(  
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发此篇目的是希望有同样是设计RFID Tag领域的同修，一起来看看，并讨论文章中的方法是否可行。 iZ[tHw||  
因为小弟在follow pape .. X_; *`,<T  

NnxM3*  

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