title: A quasi-optical vector near-field measurement system at terahertz band.
abstract: This paper describes a vector near-field measurement system at terahertz band based on a high sensitivity superconducting receiver equipped with a quasi-optical probe for high resolution near-field sensing. A novel single-receiver rather than commonly used dual-receiver configuration is adopted for vector measurement. Performances of the measurement system including stability and dynamic range are studied. Vector near-field measurement of a diagonal feedhorn at 850 GHz is presented and shows good agreement with simulation and direct far-field measurement.
authors.affiliation: Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Lou
authors.affiliation: Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Hu
authors.affiliation: Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China.
authors.forename: Kang-Min
authors.initials: KM
authors.lastname: Zhou
authors.affiliation: Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Miao
authors.affiliation: Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, JiangSu 210008, China.
authors.forename: Sheng-Cai
authors.initials: SC
authors.lastname: Shi