[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 IE+{W~y\  
characterization of the impedance of balanced RF identification <'>c`80@\*  
(RFID) tag antennas is presented, and the application of the proposed p9 <XaJ}  
method in RFID tag co-design is demonstrated. The balanced 2-s ,PQno^  
tag antenna is considered as a two-port network and the H9?(5  
impedance of the antenna is characterized using network parameters. mXtsP1  
In the measurement, the antenna is connected to the two ports W4%I%&j  
of a vector network analyzer through a test fixture. The influence Iq]+O Q  
of the test fixture is deembedded by using a port-extension technique >gRb.-{ux  
and the antenna impedance can be extracted directly from &G\Vn,1v  
the measured -parameters. 3yX^93  
The proposed method is useful in practical RFID applications "oz : & #+  
for co-designing the RFID tag with the attached platforms for i882r=TE3  
enhancing the tag performance. An example of co-designing M+j V`J!  
an ultra-high-frequency RFID tag with a plastic Sushi plate is F0t-b%w,  
demonstrated. The co-designed tag antenna achieves conjugate f~%|Iu1ob  
matching with the application-specific integrated circuit so that 5Tag-+  
the reading range of the RFID tag is greatly enhanced. CBN,~wzP*  
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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。 fd!bs*\X  
因为小弟在follow pape .. Ngi]I#Vz  
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