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本文提出了一种基于65nm CMOS工艺的2至16GHz步进频率雷达，用于乳腺癌诊断成像，实现了204mW功耗和3mm分辨率。该设计解决了传统商用矢量网络分析仪在灵敏度、尺寸和成本方面的不足，为医疗雷达成像提供了高集成度的定制硬件方案。
Radar imaging is gaining interest for medical, security, and industrial applications. Enabled by the advances in silicon technologies, a clear trend towards higher integration is observed [1-3]. Early-stage breast cancer detection is a promising application for radar imaging, as first clinical trials with patients have been carried out [4]. Commercial VNAs have been used in these experiments, but custom hardware is needed to improve the sensitivity, and to decrease the size and the cost of the setup [4]. Medical radar imaging sets great challenges. The radiation must be coupled into the body, while the skin acts as a shield. The waves that penetrate beyond the skin are heavily attenuated (>80dB for a few centimeters at 10GHz [4]). Tumor cells have different electrical properties than the healthy tissue, thus reflecting the waves and allowing for detection; this contrast is frequency dependent, decreasing at higher frequencies. These fundamental limits result in
Michele Caruso, Matteo Bassi, Andrea Bevilacqua, Andrea Neviani
University of Padova, Padova, Italy