基于共振隧穿二极管振荡器的太赫兹频段副载波频率调制连续波雷达。

Subcarrier Frequency-Modulated Continuous-Wave Radar in the Terahertz Range Based on a Resonant-Tunneling-Diode Oscillator.

作者信息

Dobroiu Adrian, Shirakawa Yusuke, Suzuki Safumi, Asada Masahiro, Ito Hiroshi

机构信息

Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan.

Center for Natural Sciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan.

出版信息

Sensors (Basel). 2020 Nov 30;20(23):6848. doi: 10.3390/s20236848.

DOI:10.3390/s20236848

PMID:33266073

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7730032/

Abstract

We introduce a new principle for distance measurement in the terahertz-wave range using a resonant-tunneling-diode (RTD) oscillator as a source at 511 GHz and relying on the frequency-modulated continuous-wave (FMCW) radar technique. Unlike the usual FMCW radar, where the sawtooth frequency modulation is applied to the carrier, we propose applying it to a subcarrier obtained by amplitude modulation; this is advantageous when the source cannot be controlled precisely in oscillation frequency, but can easily be modulated in amplitude, as is the case of the RTD oscillator. The detailed principle and a series of proof-of-concept experimental results are presented.

摘要

我们介绍了一种用于太赫兹波范围内距离测量的新原理，该原理使用一个511千兆赫兹的共振隧穿二极管（RTD）振荡器作为源，并依赖于调频连续波（FMCW）雷达技术。与通常将锯齿波频率调制应用于载波的FMCW雷达不同，我们建议将其应用于通过幅度调制获得的副载波；当源在振荡频率上不能被精确控制，但在幅度上易于调制时，如RTD振荡器的情况，这是有利的。文中给出了详细原理和一系列概念验证实验结果。