Abstract
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.
Highlights
A Circularly Polarized Antenna Array with GainWei Hu 1,2 , Guangjun Wen 1 , Daniele Inserra 1, * , Yongjun Huang 1 , Jian Li 1 and Zhizhang (David) Chen 2,3,4, *
Wireless communication technologies, nowadays, advance and diffuse quickly, and they are continuously evolving towards smaller devices with fewer energy requirements
S11 was measured with a vector network analyzer (Agilent N5230A, Agilent Technologies, Santa Clara, CA, United States), while far-field behavior was verified in an anechoic chamber
Summary
Wei Hu 1,2 , Guangjun Wen 1 , Daniele Inserra 1, * , Yongjun Huang 1 , Jian Li 1 and Zhizhang (David) Chen 2,3,4, *. College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China
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