A Modular Antenna for UHF RFID Near-Field Desktop Reader

被引：0
作者：
Caso, R. [1 ]
Michel, A. [1 ]
Buffi, A. [1 ]
Nepa, P. [1 ]
Isola, G. [2 ]
机构：
[1] Univ Pisa, Dept Informat Engn, I-56122 Pisa, Italy
[2] CAEN RFID Srl, I-55049 Viareggio, Lucca, Italy
来源：
2014 IEEE RFID TECHNOLOGY AND APPLICATIONS CONFERENCE (RFID-TA) | 2014年
关键词：
UHF RFID systems; near field coupling; desktop reader antenna; planar modular antenna;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
The combination of a near-field coupling antenna placed in the central area of a UHF RFID desktop reader with a low-gain resonating antenna allocated at the reader border is here proposed to obtain a confined detection volume within the antenna near-field region (including both the reactive and radiative near field regions). The antenna layout consists of a spiral Travelling Wave Antenna (TWA) which series-feeds an array of two circularly-polarized miniaturized patches. The spiral TWA geometry allows for exciting an almost homogeneous field on the antenna surface, making the tag detection on the reader antenna (near-field reactive region) almost independent on tag location and orientation. The low-gain patch array is used to extend the read range up to the radiative near-field region. Good results in terms of read range and RSSI (Received Signal Strength Indicator) distribution have been checked experimentally, also for a stacked tag configuration.
引用
收藏
页码：204 / 207
页数：4
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