High Resolution Millimeter Wave Imaging Based on FMCW Radar Systems at W-Band

TL;DR

This paper introduces a high-resolution, all-weather millimeter wave imaging system using FMCW radar at W-band, capable of competing with Lidar in resolution and functioning effectively in adverse weather conditions.

Contribution

The paper presents a novel 2D millimeter wave imaging system utilizing SAR concepts and custom FMCW radar, achieving high resolution and weather resilience.

Findings

System achieves high resolution comparable to Lidar.

Operates effectively in heavy rain and fog.

Uses novel signal processing methods for imaging.

Abstract

In this paper, we present a unique $\text {2D}$ high resolution, compact, low-cost, lightweight, and highly accurate millimeter wave imagery system capable of operating in all weather conditions. We describe millimeter wave imaging process in detail and present several novel signal processing methods with their applications. To create the array, we utilize the Synthetic Aperture Radar (SAR) concept. The imagery system presented in this paper, can strongly compete with Lidar systems as the resolution limit is at the same level. Furthermore, in contrast to the Lidar systems, our imagery system can operate in heavy rain and dense fog and produce high quality images. Finally, we utilize our wide-band custom-made Frequency Modulated Continuous Wave (FMCW) radar, which operates at W-band with $\text {33 GHz}$ bandwidth, for data collection and present the results.