THz波段便携冷噪声标准源研究  

Research on THz Portable Cold Noise Standard Source

作　　者：栾鹏[1] 刘晨[1] 杜静 王一帮[1] 霍晔 吴爱华[1] LUAN Peng;LIU Chen;DU Jing;WANG Yibang;HUO Ye;WU Aihua(The 13th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang,Hebei 050051,China;Shijiazhuang Division of PLAA Infantry College,Shijiazhuang,Hebei 050083,China)

机构地区：[1]中国电子科技集团公司第十三研究所,河北石家庄050051 [2]陆军步兵学院石家庄校区,河北石家庄050083

出　　处：《计量学报》2024年第11期1733-1737,共5页Acta Metrologica Sinica

摘　　要：介绍了中国电科第十三研究所新研究的170~260 GHz便携式冷噪声标准源的工作原理、结构特点、性能验证和不确定度评定。该装置采用浸于液氮制冷的矩形波导体内的匹配尖劈负载,将噪声功率通过波导传输线直接传输到室温输出波导端口的方案。通过尖劈负载的仿真设计及可靠安装实现噪声源的低反射输出,采用抽真空方案实现噪声源的便携化,基于精确控温实现噪声源的准确定标。通过分析和试验表明:该标准源的输出驻波比小于1.2,输出噪声温度小于140 K,输出噪声温度不确定度小于7 K(k=2)。The working principle,structural characteristics,performance verification,and uncertainty evaluation of the 170~260 GHz portable cold noise standard source newly developed by the 13th Research Institute of China Electronics Technology Group Corporation is introduced.The device adopts a matched wedge load immersed in a rectangular waveguide cooled by liquid nitrogen,and transmits noise power directly to the output waveguide port at room temperature through the waveguide transmission line.Realize low reflection output of noise sources through simulation design and reliable installation of wedge loads;Adopting a vacuum pumping scheme to achieve portability of noise sources;Accurate calibration of noise sources based on precise temperature control.By simulating the design and reliable installation of wedge loads,low reflection output of the noise source is achieved.A vacuum pumping scheme is adopted to make the noise source portable,and accurate calibration of the noise source is achieved based on precise temperature control.Through analysis and experiments,it is shown that the output standing wave ratio of the standard source is less than 1.2,the output noise temperature is less than 140 K,the uncertainty of output noise temperature is less than 7 K(k=2).

关 键 词：无线电计量 冷噪声标准源 噪声温度 太赫兹技术 尖劈负载 不确定度 

分 类 号：TB973[一般工业技术—计量学]