A 0.55-THz Self-Injection-Locked Resonant Tunneling Diode Radar for Micrometer Ranging

IF 4.3 2区综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Sensors Journal Pub Date : 2025-08-07 DOI:10.1109/JSEN.2025.3594754

Jonas Watermann;Fabian van Essen;Enes Mutlu;Christian Preuss;Konrad Müller;Nils G. Weimann

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引用次数: 0

Abstract

This work presents self injection-locked (SIL) continuous-wave (cw) radar sensors based on resonant tunneling diode (RTD) oscillators. The free-running RTD oscillators show micrometer resolution in sampling the movement of a reflective target. The SIL device utilized a sawtooth-like frequency modulation with

$\lambda /{2}$

periodicity induced by time-delayed feedback, which is used for unambiguous ranging. The maximum frequency shift achieved herein is 5.5 GHz, whereby a frequency shift of about 1 GHz is used in operation. The achieved sensitivity of the SIL radar during operation is 9.2 MHz

$\mu $

${}^{-{1}}$

. We also propose a method for determining the absolute distance to the target based on the SIL frequency modulation mechanism as a proof of concept. Using a simplified circuit model for the RTD SIL radar, we convert the corresponding delay-differential equation to an approximate dynamic amplitude-phase system, to give an envelope description for the SIL radar of reduced stiffness compared to transient simulations.

查看原文本刊更多论文

一种0.55 thz自注入锁定谐振隧道二极管微米测距雷达

本文提出了基于谐振隧道二极管（RTD）振荡器的自注入锁定（SIL）连续波（cw）雷达传感器。自由运行的RTD振荡器在采样反射目标的运动时显示出微米级的分辨率。SIL装置采用锯齿状频率调制，由延时反馈引起$\lambda /{2}$周期性，用于无歧义测距。本文实现的最大频移为5.5 GHz，其中在操作中使用约1 GHz的频移。SIL雷达工作时达到的灵敏度为9.2 MHz $\mu $ m ${}^{-{1}}$。我们还提出了一种基于SIL调频机制确定目标绝对距离的方法作为概念验证。利用简化的RTD SIL雷达电路模型，将相应的延迟微分方程转化为近似的动态幅相系统，给出了与瞬态仿真相比刚度降低的SIL雷达的包络描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Sensors Journal 工程技术-工程：电子与电气

CiteScore

7.70

自引率

14.00%

发文量

2058

审稿时长

5.2 months

期刊介绍： The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice