Abstract
A novel compact and circular polarized antenna is proposed which can be easily fabricated and embedded into RFID readers. Circular polarization characteristic of the proposed antenna is achieved by introducing a crossed branch. The modified meandering line structure gives the antenna compactness characteristic. A prototype is fabricated and measured. The results show that this circular polarized antenna with compact dimension can cover the Chinese RFID operating band from 920 MHz to 925 MHz, which make's the antenna suitable for handheld terminal application of RFID readers.
Highlights
UHF RFID systems have moved from obscurity into mainstream applications due to some of their attractive features such as good reading ranges, high date rates, and potentially low cost [1–3]
RFID readers are integrating with other portable terminal devices such as mobile phone
Monopole antennas [8–10] have been widely used in wireless communications with compact characteristic, good radiation patterns, simple structure, and easy integration with other devices, especially the meandering line structure, but they are usually used for linear polarization
Summary
UHF RFID systems have moved from obscurity into mainstream applications due to some of their attractive features such as good reading ranges, high date rates, and potentially low cost [1–3]. RFID readers are integrating with other portable terminal devices such as mobile phone In these applications, the RFID reader antennas should be compact and integrated. Monopole antennas [8–10] have been widely used in wireless communications with compact characteristic, good radiation patterns, simple structure, and easy integration with other devices, especially the meandering line structure, but they are usually used for linear polarization. The antenna covers the required bandwidths of RFID in China from 920 MHz to 925 MHz. Monopole antenna with meandering line structure is designed to achieve compact characteristic, and cross loaded branches are used to achieve circular polarization. One distinguishing feature of the proposed antenna is that meandering line monopole antennas, which have been widely used in terminals and usually used for linear polarization, can achieve circular polarization radiation. Details of the antenna design are presented, and simulated and measured results are given to demonstrate the performance of the proposed antenna
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
