Efficient antenna design of inductive coupled RFID-systems with high power demand

被引：2

作者：

Reinhold, Christian ^{[1
,2
]}

Scholz, Peter ^{[1
,2
]}

John, Werner ^{[1
,2
]}

Hilleringmann, Ulrich ^{[1
]}

机构：

[1] University of Paderborn, Department of Electrical Engineering, Sensor Technology Group

[2] Fraunhofer IZM, Departement Advanced System Engineering, Paderborn

来源：

Journal of Communications | 2007年 / 2卷 / 06期

关键词：

Antenna design; Inductance calculation; Inductive coupling; PEEC; Quality factor; RFID system; Wireless energy transmission;

D O I：

10.4304/jcm.2.6.14-23

中图分类号：

学科分类号：

摘要：

In contrast to pure identification labels, passive inductive coupled RFID transponders with enhanced functionality have anincreased power consumption. A nonoptimized antenna design for high power transponders may lead to a poor efficiency and high magnetic field emissions. Therefore, in this work, the energy transmission of inductive coupled systems is investigated, enabling an optimized system design. The RFID system is modeled by network elements in order to optimize the energy transmission. Next to a brief review of different methods for the antenna parameter determination, a new modification of the PEEC method is derived enabling an accelerated and accurate computation of the mutual coupling of the reader and the transponder antenna. Along with the simplification of the transformed transponder impedance and the investigation of the reader matching, consecutive design steps are deduced. The influence of the location-dependent antenna coupling on the energy transmission is characterized. Two case studies are carried out showing a successful transmission of 80mW over a distance of up to 7.6 cm by 275mW reader output power. This system demonstrates an efficient energy supply of a high power transponder while keeping the field emissions low. © 2007 ACADEMY PUBLISHER.

引用

页码：14 / 23

页数：9

共 19 条

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