A Reconfigurable Passive UHF Reader Loop Antenna for Near-Field and Far-Field RFID Applications

被引：43
|
作者：
Borja, Alejandro L. [1 ]
Belenguer, Angel [1 ]
Cascon, Joaquin [1 ]
Kelly, James R. [2 ]
机构：
[1] Univ Castilla La Mancha, Dept Ingn Elctr Elect Automt & Comunicac, Cuenca 16071, Spain
[2] Univ Birmingham, Sch Elect Elect & Comp Engn, Birmingham B15 2TT, W Midlands, England
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2012年 / 11卷
关键词：
Left-handed loading; loop antenna; metamaterials; radio frequency identification (RFID);
D O I：
10.1109/LAWP.2012.2200870
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：
This letter presents a passive UHF printed loop antenna with left-handed loading. The RFID reader antenna can work at near-and far-field operation within the European UHF (865-868 MHz) band. The operation frequency and radiation properties can be modified by employing varactor diodes. Also, the antenna can work in the near-field region having a flat magnetic distribution in the interrogation zone. A comparative study with other passive RFID reader conventional antennas shows that the left-handed loop achieves stronger near H-field with good impedance matching. Design details, simulated results, and a fabricated prototype are presented. The concept significantly extends the design degrees of freedom for RFID antennas.
引用
收藏
页码：580 / 583
页数：4
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