A chirped pulse Fourier transform microwave spectrometer with multi-antenna detection
A chirped pulse Fourier transform microwave spectrometer with multi-antenna detection
复制标题
具有多天线检测功能的啁啾脉冲傅立叶变换微波光谱仪
DOI:
10.1016/j.jms.2020.111396
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发表时间:
2020
影响因子:
1.4
通讯作者:
Grubbs II, G.S.
中科院分区:
文献类型:
--
作者:
Duerden, Amanda;Marshall, Frank E.;Moon, Nicole;Swanson, Christian;Donnell, Kristen M.;Grubbs II, G.S.
The construction of a new chirped pulse Fourier transform microwave (CP-FTMW) spectrometer with multiple-antenna detection (MAD) is reported. The instrument design and execution represent a completely new approach to possibly increasing sensitivity in CP-FTMW spectroscopy as it does not involve increased sampling, power, or passes of microwaves with the molecular sample. This is particularly advantageous for experiments where only one sampling point is available. The MAD-CP-FTMW or “MAD Chirp” is demonstrated on both linear molecule carbonyl sulfide (OCS) and asymmetric-top molecule 1,3-difluorobenzene (DFBZ) with detection points at the broadcast antenna as well as in the quadrature to the traditional receiving antenna. Signal-to-noise comparisons with each sample at each detection point have been made and are reported. Experiments demonstrating the signals detected in these new positions are molecular and not an artifact of a reflection are reported. Although this represents a first step to a possible new approach to addressing CP-FTMW sensitivity, no sensitivity increase based on this method is currently reported.
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