Design of Near-Field antennas for UHF RFID

• Main Authors: Cheng-Hua Huang, 黃政華
• Other Authors: Jen-Yoa Jan
• Format: Others
• Language: zh-TW
• Published: 101
• Online Access: http://ndltd.ncl.edu.tw/handle/10928106770927230641

碩士 === 國立高雄應用科技大學 === 電子工程系 === 100 === In this thesis, the study mainly focuses on the design of near field reader antenna for UHF RFID. The proposed antenna is based on a full-wave loop antenna for UHF (925 MHz) application. In chapter 2, the proposed antenna with double loop is designed by means of bending manner that makes the current nulls into the proposed structure, and it reduces the interference of the uniform magnetic field. In chapter 3, the proposed double S-shape antenna, added a strip line can be improved magnetic field in the center of the antenna, a coupled trip is fed into the antenna on the back side of the substrate to reduce the interference of the magnetic field. In chapter 4, the proposed double loop antenna, is formed by the two sets of full-wave loop antennas, to produce a uniform magnetic field distribution in a greater area those near-field antennas are measured in anechoic chamber and use Ansoft HFSS simulation software to verify the correction of the results. Details of the measured and simulated results of the proposed near-field antennas are presented and discussed.