A Circularly Polarized Antenna Array with Gain Enhancement for Long-Range UHF RFID Systems

Electronics

Zhizhang(David) Chen¹  Jian Li²  Wei Hu²  Daniele Inserra²  Yongjun Huang²  Guangjun Wen² 

[1] School of Electronic Science and Engineering, University of Electronics Science and Technology of China, Chengdu 611731, China;School of Information and Communication Engineering, University of Electronics Science and Technology of China, Chengdu 611731, China;

关键词: antenna arrays;    high gain;    circular polarization;    sequential phase;   

DOI  :  10.3390/electronics8040400

来源: DOAJ

【 摘 要 】

A 2 × 2 circularly polarized (CP) sequential rotation microstrip patch antenna array with high gain for long-range ultra-high frequency (UHF) radio frequency identification (RFID) communication is proposed in this paper. In order to meet the operational frequency band requirement of 840–960 MHz and, at the same time, achieve enhanced broadside gain, a two-level sequential rotation structure is developed. Series power divider is used as the basic element of the feed network that is implemented with the substrate-integrated coaxial line technology for minimizing radiation losses. The manufactured prototype exhibits a peak gain of 12.5 dBic at 900 MHz and an axial ratio (AR) bandwidth (AR ≤ 3 dB) of 18.2% from 828 to 994 MHz. In comparison with the state-of-the-art, the proposed antenna shows an excellent gain/size trade-off.

【 授权许可】

Unknown