An OAM-Mode Reconfigurable Array Antenna With Polarization Agility

IEEE Access

Jinzhu Zhou¹  Le Kang²  Shufeng Zheng³  Hui Li⁴ 

[1] School of Automation and Information Engineering, Xi&x2019;School of Mechano-Electronic Engineering, Xidian University, Xi&x2019;an University of Technology, Xi&x2019;an, China;

关键词: Orbital angular momentum;    mode reconfigurability;    polarization agility;    reconfigurable feed network;   

DOI  :  10.1109/ACCESS.2020.2975846

来源: DOAJ

【 摘 要 】

An Orbital angular momentum (OAM) antenna with both mode reconfigurability and polarization agility is proposed in this paper. The proposed antenna is designed based on a four-element uniform circular array with a phase-shifting reconfigurable feed network. To reduce its dimensions and complexity, the feed work is constructed with two stages of single-pole double-throw switches and a stage of 90° phase-shifting power dividers, partially of which can be shared among the chosen operating states. Moreover, the use of a small amount of p-i-n diodes as binary switches allows low insertion loss and low component cost. By varying the ON/OFF status of the diodes strategically, the resultant array can be reconfigured to horizontal polarization (HP) or vertical polarization (VP), along with OAM mode $l = -1$ or +1 achieved for each polarization. The antenna performance is evaluated in terms of reflection coefficients, near-field distributions and far field radiation patterns. According to the measured results, the antenna exhibits an overlapped frequency band ranging from 2.29 to 2.59 GHz among the different operating states. Meanwhile, stable radiation patterns as well as high cross-polarization discrimination can be obtained. Benefiting from the above features, the antenna could help to improve the signal quality and increase the channel capacity in wireless communications.

【 授权许可】

Unknown