Summary

International Symposium on Antennas and Propagation

2010

Session Number:4FC2

Session:

Number:4FC2-4

A Broadband Flat Antenna on Corrugated Structure

Sitthichai Dentri,  Chuwong Phongcharoenpanich,  

pp.-

Publication Date:2010/11/23

Online ISSN:2188-5079

DOI:10.34385/proc.52.4FC2-4

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Summary:
Recently, Radio Frequency Identification (RFID) system becomes very popular to provide wireless identification and tracking in many applications such as indoor positioning system (IPS) [1-2] and global positioning system (GPS) [3]. The RFID communication [4-5] from point to point is very important. The antenna for this application should possess unidirectional pattern with narrow beamwith, low side and back lobes and high gain. Conventionally, the unidirectional beam antenna is achieved by using the typical antennas such as Yagi-Uda antenna [2], helical antenna with axial mode and microstrip antenna with fundamental mode. However, these antennas possess low directivity because the electrical structure is rather small. In order to enhance the directivity, the array must be arranged. The feeding network is rather complicated. The feeding loss becomes more pronounced. Therefore, the antenna on the reflector is an alternative solution. In this paper, the simple structure of square plate antenna is designed to achieve the broadband the low side and back lobe levels, narrow beamwidth and desired beam direction. Each country in world uses UHF RFID system with different frequencies such as 920-925 MHz in Thailand, 866?869 MHz in Europe, 902?928-MHz band in America and many countries. The universal antenna will be operated at the frequency of 860-960 MHz that can operate in all standard frequencies of RFID system over the world.