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Optimized sensitivity and beam pattern of a twin-slot antenna coupled NbN HEB mixer at 1.6THz
W. Zhang ; D. Hayton ; J. R. Gao ; M. Hajenius ; W. Miao ; D. Liu ; T. M. Klapwijk ; S. C. Shi
2012
Source PublicationProceedings of SPIE--Infrared, Millimeter-Wave, and Terahertz Technologies
Volume8452Pages:84522H
AbstractWe report on a twin-slot antenna coupled superconducting NbN hot electron bolometer (HEB) mixer designed for 1.6 THz. Terahertz (THz) radiation is quasi-optically coupled to the HEB with an uncoated elliptical Si lens. Measured DSB receiver noise temperatures are 1500 K at 0.85 THz, 1200 K at 1.27 THz, 1100 K at 1.31 THz, 1100 K at 1.4 THz, and 1000 K at 1.63 THz. This value at 1.63 THz is reduced to 750 K when the hot/cold loads in vacuum are used. The frequency dependence of the noise temperature is consistent with the measured FTS spectral response. The measured farfield beam patterns of the lens/antenna combination show nearly collimated beams with the side lobes below -16dB by adding a 40 μm extension to a standard Si elliptical lens design, which is understood by considering a slightly lower dielectric constant of Si (εSi) of 11.4 instead of 11.7. The good performance of such NbN HEB mixers makes it suitable for future high-resolution spectroscopic astronomical applications.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7980
Collection毫米波和亚毫米波技术实验室
Recommended Citation
GB/T 7714
W. Zhang,D. Hayton,J. R. Gao,et al. Optimized sensitivity and beam pattern of a twin-slot antenna coupled NbN HEB mixer at 1.6THz[J]. Proceedings of SPIE--Infrared, Millimeter-Wave, and Terahertz Technologies,2012,8452:84522H.
APA W. Zhang.,D. Hayton.,J. R. Gao.,M. Hajenius.,W. Miao.,...&S. C. Shi.(2012).Optimized sensitivity and beam pattern of a twin-slot antenna coupled NbN HEB mixer at 1.6THz.Proceedings of SPIE--Infrared, Millimeter-Wave, and Terahertz Technologies,8452,84522H.
MLA W. Zhang,et al."Optimized sensitivity and beam pattern of a twin-slot antenna coupled NbN HEB mixer at 1.6THz".Proceedings of SPIE--Infrared, Millimeter-Wave, and Terahertz Technologies 8452(2012):84522H.
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