Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FC4
Session:
Number:4FC4-2
A CP Antenna with a Multi-Bending Strip for Handheld Reader Applications
Yuan-Chih Lin, Wen-Shan Chen, Yu-Ming Huang, Tzu-Chen Hung, Chii-Ruey Lin,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Generally, RFID is a short-range wireless communication to compare the existing technology, bar code identification. The main difference between RFID and bar code is RFID eliminates the need for line-of-sight (LOS) reading. Comparing with the LF and HF RFID systems, the UHF RFID system has longer reading distance and higher data-rates, etc. Due to UHF allocation by countries, the frequency range for UHF RFID application is 902?928MHz in North America (USA, Canada) and South America (Brazil, Argentina, etc.), 865.5?867.6MHz in Europe and 922-928 MHz in Taiwan, etc. Furthermore, RFID handheld antennas are very often used to operate in proximity to user’s hand, as well as other obstacles. Based on these reasons, user’s holding effect and multi-patch effect [2-3], circular polarization (CP) patch antenna becomes the best candidate for the requests of the handheld RFID readers. For practical requirement, patch antenna for CP also can be switched by feeding construction without changing mechanical structure [7]. The prototype of the proposed design was implemented. Both of the simulated and experimental results of the proposed antenna are demonstrated.