发表机构
Ibaraki University; ROHM Research & Development Center, ROHM Co., Ltd.; Adelaide University; The University of Tokyo（茨城大学; 罗姆研发中心，罗姆有限公司; 阿德莱德大学; 东京大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种基于单RTD每像素架构的4×4单站雷达阵列，利用自混频和共享透镜实现顺序多方向测距及16像素太赫兹成像，提供紧凑的电子可寻址传感方案。
AI 中文摘要
太赫兹（THz）传感在无损检测、成像和计量学方面具有巨大潜力，但现有系统的成本和复杂性仍是实际部署的障碍。本文提出一种基于单RTD每像素架构的紧凑型4×4单站雷达阵列，其中每个谐振隧穿二极管（RTD）既充当偏置可调振荡器，又充当自混频探测器。RTD元件通过低频开关网络顺序寻址，并共享相同的基带控制和读出电子设备。一个共享的3D打印介质透镜将RTD元件映射到空间上分离的传感方向。我们实验验证了所有阵列元件的操作，并使用四个选定元件演示了顺序多方向测距，随后进行了初步的16像素太赫兹成像。通过将每个像素的自混频与低频选择和共享光学相结合，该阵列避免了每个像素单独的太赫兹接收链，为电子可寻址的太赫兹传感和成像提供了一种紧凑的架构。
英文摘要
Terahertz (THz) sensing offers significant potential for nondestructive evaluation, imaging, and metrology, but the cost and complexity of existing systems remain barriers to practical deployment. This letter presents a compact 4 by 4 monostatic radar array based on a single-RTD-per-pixel architecture, in which each resonant tunneling diode (RTD) functions as both a bias-tunable oscillator and a self-mixing detector. The RTD elements are sequentially addressed through a low-frequency switching network and share the same baseband control and readout electronics. A shared 3D-printed dielectric lens maps the RTD elements to spatially separated sensing directions. We experimentally verify the operation of all array elements and demonstrate sequential multidirectional ranging using four selected elements, followed by preliminary 16-pixel THz imaging. By combining self-mixing at each pixel with low-frequency selection and shared optics, the array avoids a separate THz receiver chain for each pixel and provides a compact architecture for electronically addressable THz sensing and imaging.
