Design of a Near-Field Nonperiodic Zero Phase Shift-Line Loop Antenna With a Full Dispersion Characterization

作者：Zeng Yunjia^*; Chen Zhi Ning; Qing Xianming; Jin Jian Ming

来源：IEEE Transactions on Antennas and Propagation, 2017, 65(5): 2666-2670.

DOI：10.1109/TAP.2017.2679061

• Dispersion analysis
• radio frequency identification (RFID)
• zero phase shift-line (ZPSL) loop antenna

The tradeoff between the magnetic field distribution, the magnetic field intensity, and the interrogation zone size is one of the most challenging issues in designing a zero phase shift-line (ZPSL) loop antenna for near-field ultrahigh-frequency radio frequency identification (RFID) applications. In this communication, the dispersion characteristics, including phase and attenuation constants, of the ZPSL in a loop configuration are thoroughly analyzed, such that the important design tradeoff can be fully quantified. Based on the dispersion characteristics, a nonperiodic ZPSL loop antenna with nonuniformly arranged unit cells is proposed. Compared with the periodic configurations, the proposed nonperiodic ZPSL loop antenna shows an improved magnetic field distribution with an enhanced magnetic field intensity.

• 出版日期2017-5