Circularly Polarized Azimuthally Omnidirectional Terahertz Fan-Beam Tracking With Electronic Polarization Synthesis

IF 3.6 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-03-19 DOI:10.1109/TTHZ.2026.3694964

Ryoma Sonoyama;Masahiko Inami;Yasuaki Monnai

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Abstract

Terahertz (THz) beam tracking for mobile links requires not only full-azimuth coverage but also polarization control to ensure seamless connectivity under arbitrary device rotation and motion. This work presents a gimbal-integrated THz beam-steering architecture with electronically reconfigurable polarization that enables azimuthally omnidirectional tracking with orientation-insensitive circular polarization (CP). Two coherent THz signals are generated and independently controlled in amplitude and phase difference, then combined through an orthomode transducer to excite an annular-aperture fan-beam antenna. Measurements verify CP synthesis at multiple azimuths, achieving an axial ratio below 3 dB. Closed-loop azimuth steering is verified using an automated receiver stage, employing a hill-climbing algorithm. Furthermore, a hand-held demonstration using a head-mounted display demonstrates effective beam tracking under rapid user motion. The results establish a practical approach to motion-tolerant THz links with electronically synthesized polarization.

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基于电子偏振合成的圆偏振方位全向太赫兹扇形波束跟踪

移动链路的太赫兹（THz）波束跟踪不仅需要全方位覆盖，还需要极化控制，以确保在任意设备旋转和运动下无缝连接。这项工作提出了一种带有电子可重构偏振的万向台集成太赫兹波束导向架构，该架构可以实现方向不敏感圆偏振（CP）的方位全向跟踪。产生两个相干太赫兹信号，分别在幅差和相位差上进行独立控制，然后通过正交换能器组合，激励环形孔径扇形波束天线。测量验证了多个方位的CP合成，实现了低于3db的轴向比。采用爬坡算法，利用自动接收级验证了闭环方位转向。此外，使用头戴式显示器的手持演示演示了在快速用户运动下有效的光束跟踪。结果为电子合成极化的运动容忍太赫兹链路建立了一种实用的方法。

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来源期刊

IEEE Transactions on Terahertz Science and Technology ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

7.10

自引率

9.40%

发文量

102

期刊介绍： IEEE Transactions on Terahertz Science and Technology focuses on original research on Terahertz theory, techniques, and applications as they relate to components, devices, circuits, and systems involving the generation, transmission, and detection of Terahertz waves.