Rapid and Energy-Efficient Molecular Sensing Using Dual mm-Wave Combs in 65 nm CMOS : A 220-to-320 GHz Spectrometer with 5 . 2 mW Radiated Power and 14 . 6-to-19 . 5 dB Noise Figure
Rapid and Energy-Efficient Molecular Sensing Using Dual mm-Wave Combs in 65 nm CMOS : A 220-to-320 GHz Spectrometer with 5 . 2 mW Radiated Power and 14 . 6-to-19 . 5 dB Noise Figure
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使用 65 nm CMOS 中的双毫米波梳进行快速、节能的分子传感：具有 5 个 220 至 320 GHz 光谱仪。
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发表时间：
2017
期刊：
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通讯作者：
R. Han
中科院分区：
文献类型：
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作者：
Cheng Wang;R. Han
毫米波/太赫兹旋转光谱学为化学和生物医学传感提供了超宽探测范围的气体分子。因此，对宽带、高能效和快速扫描的CMOS光谱仪的需求越来越大。使用窄脉冲源和电磁散射的光谱仪[1]是宽带的，但它们的分辨率不能满足绝对特异度的要求(<；10 kHz)。或者，使用单个可调音调的方案在带宽和性能之间表现出显著的折衷。文献[2]中的245 GHz光谱仪的辐射功率为4 mW，但带宽仅为14 GHz。在[3]和[4]中，以降低辐射功率(0.1 mW)和噪声系数(Nf=18.4~~23.5分贝)为代价，获得了更宽的带宽。此外，在典型的10 kHz分辨率和1ms积分时间下，用单音扫描100 GHz带宽需要长达3个小时。本文报道了一种基于双频梳扫描的快速、节能的光谱仪结构。基于该结构实现了220~320 GHz的CMOS谱仪样机，其总辐射功率为5.2 mW，噪声系数为14.6~19.5dB。
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 a rapid, energy-efficient spectrometer architecture based on dual-frequency-comb scanning. A 220-to-320GHz CMOS spectrometer prototype based on this architecture is demonstrated with a total radiated power of 5.2mW and a NF of 14.6 to ~19.5dB.