Review of Zero-Phase-Shift-Line Loop Antennas

Review of Zero-Phase-Shift-Line Loop Antennas

IEEE JOURNAL OF RADIO FREQUENCY IDENTIFICATION

10.1109/JRFID.2018.2798541

Zhi Ning Chen, Xianming Qing, Jin Shi, Yunjia Zeng

01 December 2017

Z. N. Chen, X. Qing, J. Shi and Y. Zeng, "Review of Zero-Phase-Shift-Line Loop Antennas for UHF Near-Field RFID Readers," in IEEE Journal of Radio Frequency Identification, vol. 1, no. 4, pp. 245-252, Dec. 2017. doi: 10.1109/JRFID.2018.2798541

The design of electrically large loop-type antennas for ultra-high frequency (UHF) near-field radio frequency identification (RFID) readers is a challenge due to the inherent limitation of loop type antennas. This paper reviews the development of the zero-phase-shift-line (ZPSL) loop antennas for UHF near-field RFID systems. First, the state-of-the-art ZPSL loop antennas are briefed and then the modeling of the ZPSL structures is introduced. After that, some typical electrically large ZPSL loop antennas for UHF near-field RFID readers are demonstrated, including single-loop antenna, dual-loop antenna, grid loop array antenna, and artificial magnetic conductor backed directional loop antenna. All the patentable works have been applied for industry applications.

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