UCA Based OAM Beam Steering With High Mode Isolation
UCA Based OAM Beam Steering With High Mode Isolation
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基于 UCA 的 OAM 波束控制，具有高模式隔离度
DOI：
10.1109/lwc.2022.3151885
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发表时间：
2022
影响因子：
6.3
通讯作者：
Yu Zhao
中科院分区：
文献类型：
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作者：
Wei Yu;Bin Zhou;Z. Bu;Yu Zhao
在基于均匀圆阵(UCA)的轨道角动量(OAM)通信中，收发信机未对准的情况下，需要进行波束控制以克服性能恶化。为了保持操纵型OAM光束的涡旋特性和模式隔离特性，本文提出了一种混合位置位相波控(HPPBS)方案。对于目标偏转角度<；内联公式&>；；tex-ath notation=“LaTeX”&>$(\theta，\phi)$<；//内联-公式&>；/内联-公式&>的偏转，<；内联-公式&>的偏转是通过<；内联-公式&>的相位调整和偏转实现的。TeX数学符号=“LaTeX”>；$\Phi$<；/tex数学>；/行内公式>；通过调整天线位置来实现。理论分析表明，利用该方案可以产生给定方向的准理想OAM波束。为了使该方案可行，我们建议将其部署在平面相控阵上。仿真结果表明，与现有的OAM波束控制方案相比，我们的HPPBS方案可以灵活地调整OAM波束的方向，同时保持了各OAM模式之间的高隔离度。
In the case of uniform circular array (UCA) based Orbital Angular Momentum (OAM) communications with misaligned transceivers, beam steering is needed to overcome the performance deterioration. To keep the vortex characteristics and the mode isolation of the steered OAM beam, we propose a Hybrid Position Phase Beam Steering (HPPBS) scheme in this letter. For the target deflection angle <inline-formula> <tex-math notation="LaTeX">$(\theta,\phi)$ </tex-math></inline-formula>, the deflection of <inline-formula> <tex-math notation="LaTeX">$\theta $ </tex-math></inline-formula> is achieved through the phase adjustment and the deflection of <inline-formula> <tex-math notation="LaTeX">$\phi $ </tex-math></inline-formula> is realized through the antenna position adjustment. The theoretical analysis shows that a quasi-ideal OAM beam of the given direction is generated using our scheme. In order to make the scheme feasible, we propose to deploy it on a planar phased array. Simulation results indicate that compared with the existing OAM beam steering scheme, our HPPBS scheme can flexibly adjust the directions of OAM beams while maintaining high isolation among each OAM mode.