论文标题
通过线性两极化的双透明节天线在Terahertz地区线性两极化的昏迷校正
Spot Focusing Coma Correction by Linearly Polarized Dual-Transmitarray Antenna in the Terahertz Region
论文作者
论文摘要
在许多Terahertz（THZ）成像和传感应用中，焦点扫描至关重要。传统的单一聚焦传输片可以在源轴上轴上时获得良好的焦点，但是将源移动源会产生明显的畸变。本文提出了一种新的方法，可以减少THZ地区过轴扫描的昏迷。在这里，提出了双重传输解决方案，其中将具有优化相位曲线的传输片放置在常规相位曲线传输段后面。对线性极化的双层型天线进行了验证，并在实验表征了聚焦性能。测得的结果与理论上的结果非常吻合。双透明膜天线的生成斑点仍集中在高达50美分的角度上，-3 dB的斑点大小在290 GHz时小于4 mm。在整个扫描范围内，测得的近场旁边均低于-10 dB。
Focus scanning is critically important in many terahertz (THz) imaging and sensing applications. A traditional single focusing transmitarray can achieve a good focus when the source is on-axis but moving the source off-axis produces a significant aberration. This paper presents a novel approach to reducing coma in off-axis scanning in the THz region. Here, a dual transmitarray solution is proposed, in which a transmitarray with an optimized phase profile is placed behind a regular phase profile transmitarray. A linearly polarized, dual-transmitarray antenna was fabricated for validation, and the focusing performances were experimentally characterized. The measured results are in good agreement with the theoretical ones. The generated spot of the dual-transmitarray antenna remains focused on an angle up to 50deg, with a -3 dB spot size of less than 4 mm at 290 GHz. The measured near-field sidelobes are all below -10 dB within the whole scanning range.
