宽频大口径低温接收机噪声测试研究  

Study on noise measure of cryogenic receiver with broadband and large diameter feed

作　　者：邓凯华[1,2] 丁先庚 罗蓉[3] 王生旺 王志杰 张梅[1,2] Deng Kaihua;Ding Xiangeng;Luo Rong;Wang Shengwang;Wang Zhijie;Zhang Mei(Key Laboratory of Superconducting&Electronic Technologies,CETC,Hefei 230088,China;The 16th Institute of CETC,Hefei 230088,China;The 39th Institute of CETC,Xian 710065,China)

机构地区：[1]中国电子科技集团公司超导电子技术重点实验室,合肥230088 [2]中国电子科技集团公司第十六研究所,合肥230088 [3]中国电子科技集团公司第三十九研究所,西安710065

出　　处：《低温与超导》2021年第2期111-114,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金面上项目(11873079)资助。

摘　　要：为解决2~14 GHz宽频大口径馈源低温接收机等效噪声温度测试难度大的问题,研制了一套测试装置,论述了等效噪声温度测试基本理论和测试方法,分析了测试过程中商用通信频率和馈源张角对测试结果的影响。测试结果表明,在三个频率点2.2 GHz、8 GHz和14 GHz测试值分别为15.8 K、12.1 K和25.2K,均优于项目要求的指标,验证了测试数据可靠、测试方法可行。In order to realize the equivalent noise temperature(ENT) measure of a cryogenic receiver with 2~14 GHz broadband and large diameter feed, a set of test device was developed, basic theory and method of ENT measure were described, the affects of commercial communication waveband and feed open angle on measure results were analysed. The results show that the measured values are 15.8 K, 12.1 K and 25.2 K at 2.2 GHz, 8 GHz and 14 GHz respectively,which are better than the set values. The measured data and method of ENT are verified.

关 键 词：宽频段 大口径馈源 低温接收机 等效噪声温度 

分 类 号：TN957.2[电子电信—信号与信息处理]