17.6 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
17.6 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
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17.6 使用 65nm CMOS 中的双毫米波梳进行快速、节能的分子传感：具有 5.2mW 辐射功率和 14.6 至 19.5dB 噪声系数的 220 至 320GHz 光谱仪
DOI：
10.1109/isscc.2017.7870381
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发表时间：
2017
期刊：
影响因子：
--
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/太赫兹旋转光谱为化学和生物医学传感提供了超宽范围的气体分子检测。因此，需要宽带、节能和快速扫描的CMOS光谱仪。使用窄脉冲源和电磁散射的光谱仪[1]是宽带的，但它们的分辨率不满足绝对特异性的要求（<10 kHz）。或者，使用单个可调谐音调的方案在带宽和性能之间表现出显著的折衷。[2]中的245 GHz频谱仪辐射功率为4 mW，但带宽仅为14 GHz。在[3]和[4]中，以降低辐射功率（0.1mW）和噪声系数（NF=18.4至23.5dB）为代价实现了更宽的带宽。此外，给定典型的10 kHz分辨率和1 ms积分时间，使用单音扫描100 GHz带宽需要长达3小时。提出了一种基于双频梳状扫描的快速、节能光谱仪结构。基于该结构的220 ~ 320 GHz CMOS频谱仪样机的总辐射功率为5.2mW，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.