[天线]A Passive RFID Tag Antenna Installed in a Recessed

Dongho Kim Junho Yeo c 3| Lk7Q  
Electron. & Telecommun. Res. Inst., Daejeon, South Korea *S<I!7Q  
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This paper appears in:  Antennas and Propagation, IEEE Transactions on  Issue Date : Dec. 2010                                                                                          -->  `m_fi  
Issue Date :  Dec. 2010 b)X
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Volume :  58 ,  Issue:12 Z$Ps_Ik  
On page(s): 3814 k-*k'S_  
ISSN :  0018-926X cbou1Ei   
INSPEC Accession Number: 11684782 8zeD%Uv  
Digital Object Identifier :  10.1109/TAP.2010.2078438 {hO|{vz  
Date of Publication :   23 九月 2010 <.lN'i;(  
Date of Current Version :   03 十二月 2010 Cu$`-b^y  
Sponsored by :   IEEE Antennas and Propagation Society T|oDJ]\J  
Abstract N/0Q`cQ-  
A passive RFID tag antenna in a recessed cavity in metallic objects such as vehicles, air craft, and metallic containers, and an impedance matching technique for this configuration are proposed. The proposed tag antenna can be considered as a cavity-backed antenna and it is comprised of a bowtie antenna installed in a recessed cubic volume in a large metallic object, and the input impedance of the bowtie antenna can be easily matched by adjusting the coupling effect between the tag antenna and the cavity. Main parameters affecting the coupling are the dimensions of the cavity and the location of the bowtie antenna inside the cavity. For more practical analysis of the impedance matching process, an equivalent-circuit model consisting of several lumped elements is introduce .. `.VkR5/  
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