一种高温噪声源设计  

Design of a High Temperature Noise Source

作　　者：王超楠 刘婷 廉珂 高春彦 成俊杰 胡瑜 WANG Chaonan;LIU Ting;LIAN Ke;GAO Chunyan;CHENG Junjie;HU Yu(Beijing Institute of Radio Metrology and Measurement,Beijing 100854,China;Shanghai Institute of Spacecraft Equipment,Shanghai 200240,China)

机构地区：[1]北京无线电计量测试研究所,北京100854 [2]上海卫星装备研究所,上海200240

出　　处：《微波学报》2024年第2期35-39,共5页Journal of Microwaves

摘　　要：针对毫米波、亚毫米波高精度噪声量传需求,文中介绍了一种采用微波辐射体实现的太赫兹频段高温噪声源,可提供500 K左右的等效输出噪声温度,不确定度小于2%。辐射体采用金字塔型高温吸波材料制成,E/H面等化性好。采用恒温槽加热方式,有效提升了辐射体的温度均匀性。采用一种改进的矩形喇叭天线用作耦合天线,有效降低端口反射,从而减小了天线对等效输出噪声温度的影响。In response to the demand for high-precision noise transmission in millimeter and submillimeter waves,a high-temperature noise source applied in THz frequency band using microwave radiator is introduced,which can provide an equivalent output noise temperature of about 500 K with an uncertainty of less than 2%.The radiator is made of pyramid-shaped high-temperature absorbing material,with good homogeneity for both E and H surfaces.The constant temperature bath heating method effectively improves the temperature uniformity of the radiator.An improved rectangular horn antenna is used to reduce the port reflection and thus reduce the effect of the antenna on the equivalent output noise temperature.

关 键 词：高温噪声源 等效输出噪声温度 辐射体 

分 类 号：TN911.4[电子电信—通信与信息系统] TP73[电子电信—信息与通信工程]