A Modular Antenna for Near-Field UHF-RFID Smart Point Readers

被引:0
|
作者
Michel, A. [1 ]
Nepa, P. [1 ]
Pino, M. R. [2 ]
机构
[1] Univ Pisa, Dept Informat Engn, Pisa, Italy
[2] Univ Oviedo, Dept Elect Engn, E-33203 Gijon, Spain
关键词
near-field; UHF RFID; Modular Antenna; desktop reader;
D O I
暂无
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
A novel configuration of a Modular Antenna proposed for NF UHF-RFID desktop reader applications is here described. Specifically, a spiral Travelling Wave Antenna (TWA) is used to generate a strong and uniform field in proximity of the antenna surface. Then, such a microstrip transmission line feeds four resonating curved slot antennas placed close to the spiral TWA and 90-degree rotated with respect to the desktop reader antenna center, through a series-feeding connection. In order to radiate a circularly polarized field, the four slots are fed with the same current amplitude and with a 90-degree phase-shift (sequential rotation feeding technique). To make the antenna scalable, the spiral TWA is extended beyond each slot antenna, so spreading the generated field in a large and arbitrarily shaped area.
引用
收藏
页码:935 / 936
页数:2
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