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Title:	Design of an RFID reader using rotating magnetic field approach
Authors:	S.M.A. Motakabber (P43311)
Supervisor:	Mohd Alauddin Mohd Ali, Prof. Dr.
Keywords:	Radio frequency identification systems Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	24-Aug-2011
Description:	Nowadays machine readable automated data acquisition systems are essential in many areas due to the needs to handle enormous amount of data and provide error free faster services. In these cases Radio Frequency Identification (RFID) has a significant role to fulfill the demands of the systems. Typically an RFID reader of a magnetically coupled system produces a time varying magnetic field to a fixed direction to read the data from the tag. Due to this fixed magnetic field direction, the flux linkage between the reader antenna and tag antenna coils vary with their relative orientation. The voltage induced in the tag antenna coil changes when its orientation is altered and it can respond only within a limited angle. Moreover, there are two dead points (or blind spots) at ±90° where the voltage induced in the tag antenna coil is almost zero and the tag does not react at all. The objective of this thesis is to develop an RFID readers high frequency interface based on modified rotating magnetic fields, which is capable of produceing a rotating magnetic field in space. This interface will overcome the angle related limitation and accordingly the automated data acquisition of the RFID system becomes faster. The proposed new model is developed mathematically to show that there exists a rotating magnetic field in the reader antenna coil. The suggested high frequency interface circuits individual functional block is designed and the input/output voltage and signal conditions are simulated by using Mentor Graphics and Microwind VLSI software. A planar inductive loop antenna for 13.56 MHz is also designed and simulated by using Sonnet Lite software. A prototype of the proposed system is also developed by using discrete electronic components and its performance is verified for the 13.56 MHz magnetically coupled RFID system. The result showsthat the voltage induced in the tag antenna coil is almost constant within 0 to ± 180° rotation without any blind spot on a single plane (i.e. around the z-axis on the XY-plane in the Cartesian coordinate system) and the tag is legible. This will enable the implementation of a tag antenna orientation independent RFID system.,Certification of Masters/Doctoral Thesis is not available,Ph.D.
Pages:	147
Call Number:	TK6570.I34M647 2011 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina

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