A UAV Based CMOS Ku-Band Metasurface FMCW Radar System for Low-Altitude Snowpack Sensing

被引：2

作者：

Tang, Adrian ^{[1
,2
]}

Chahat, Nacer ^{[1
]}

Kim, Yangyho ^{[3
]}

Bharathan, Arhison ^{[2
]}

Virbila, Gabriel ^{[2
]}

Marshall, Hans-Peter ^{[4
]}

van der Weide, Thomas ^{[4
]}

Gupta, Gaurangi ^{[1
]}

Anand, Raunika ^{[1
,2
]}

Chattopadhyay, Goutam ^{[1
]}

Chang, Mau-Chung Frank ^{[2
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91106 USA

[2] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[3] Stevens Inst Technol, Hoboken, NJ 07030 USA

[4] Boise State Univ, Boise, ID 83725 USA

来源：

IEEE JOURNAL OF MICROWAVES | 2024年 / 4卷 / 01期

基金：

美国国家航空航天局;

关键词：

Radar; Radar antennas; Snow; Sensors; Spaceborne radar; Receivers; Phase noise; MetaSurface; CMOS radar; FMCW radar; snowpack; remote sensing; UAV; WATER EQUIVALENT; GPR DATA; NOISE;

D O I：

10.1109/JMW.2023.3327188

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article presents development of a UAV based frequency modulated continuous wave (FMCW) radar system for remotely sensing the water contained within snowpacks. To make the radar system compatible with the payload requirements of small UAV platforms, the radar electronics are implemented with CMOS technology, and the antenna is implemented as an extremely compact and lightweight metasurface (MTS) antenna. This article will discuss how the high absorption losses of snowpacks lead to dynamic range requirements much stricter than FMCW radars used for automotive and other sensing applications, and how these requirements are met through antenna isolation, leakage calibration and exploitation of the range correlation effect. The article discusses in detail the implementation of the radar system, the CMOS microwave and digital circuitry, and the MTS antenna. The developed radar was mounted on a drone and conducted surveys in both Idaho and Alaska during the 2022-2023 winter season. We present several of those field results.

引用

页码：43 / 55

页数：13

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