Rapid and Energy-Efficient Molecular Sensing Using Dual mm-Wave Combs in 65nm CMOS: A 220-to-320GHz Spectrometer with 5.2mW Radiated Power and 14.6-to-19.5dB Noise Figure

📋 论文概要

该论文提出了一种基于双毫米波梳的快速节能分子传感方案，在65nm CMOS工艺中实现了220-320GHz的太赫兹光谱仪。解决了传统单音调谐方案在带宽和性能之间的权衡问题，并满足了绝对特异性所需的高分辨率。

💡 主要创新点

• 首次采用双毫米波梳结构实现宽带太赫兹光谱，兼顾高分辨率和快速扫描。
• 在65nm CMOS中集成了220-320GHz的宽频带发射和接收链路，实现了低功耗高能效传感。

🏷 关键词

📄 原文摘要

Millimeter-wave/terahertz rotational spectroscopy offers ultra-wide-detection range of gas molecules for chemical and biomedical sensing. Therefore, wideband, energy-efficient, and fast-scanning CMOS spectrometers are in demand. Spectrometers using narrow-pulse sources and electromagnetic scattering [1] are broadband, but their resolutions do not meet the requirement (<10kHz) of the absolute specificity. Alternatively, a scheme using a single tunable tone exhibits significant trade-off between bandwidth and performance. The 245GHz spectrometer in [2] presents 4mW radiated power, but only has a 14GHz bandwidth. In [3] and [4], broader bandwidths are achieved at the expense of degraded radiated power (0.1mW) and noise figure (NF=18.4 to ~23.5dB). In addition, given a typical 10kHz resolution and 1ms integration time, scanning a 100GHz bandwidth with a single tone takes as long as 3 hours. This paper reports

👥 作者与机构

Cheng Wang, Ruonan Han

Massachusetts Institute of Technology, Cambridge, MA