Chip impedance matching for UHF RFID tag antenna design

被引:93
作者
Loo, C. -H. [1 ]
Elmahgoub, K. [1 ]
Yang, F. [1 ]
Elsherbeni, A. [1 ]
Kajfez, D. [1 ]
Kishk, A. [1 ]
Elsherbeni, T. [1 ]
Ukkonen, L. [2 ]
Sydanheimo, L. [2 ]
Kivikoski, M. [2 ]
Merilampi, S. [2 ]
Ruuskanen, P. [2 ]
机构
[1] Univ Mississippi, Dept Elect Engn, University, MS 38677 USA
[2] Tampere Univ Technol, Rauma, Finland
关键词
D O I
10.2528/PIER08011804
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Passive UHF RFID tag consists of a microchip attached directly to an antenna. Proper impedance match between the antenna and the chip is crucial in RFID tag design. It directly influences RFID system performance characteristics such as the range of a tag. It is known that an RFID microchip is a nonlinear load whose complex impedance in each state varies with the frequency and the input power. This paper illustrates a proper calculation of the tag power reflection coefficient for maximum power transfer by taking into account of the changing chip impedance versus frequency.
引用
收藏
页码:359 / 370
页数:12
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