大口径低损耗微波真空窗设计  

Design of microwave vacuum window with large diameter and low loss

作　　者：邓凯华[1,2] 罗蓉 马浪明 王志杰[1,2] 王生旺 闫建[1,2] 张梅 刘洋[1,2] Deng Kaihua;Luo Rong;Ma Langming;Wang Zhijie;Wang Shengwang;Yan Jian;Zhang Mei;Liu Yang(Key Laboratory of Superconducting&Electronic Technologies,CETC,Hefei 230088,China;The 16th Institute of CETC,Hefei 230088,China;The 39th Institute of CETC,Xi'an 710065,China;National Time Service Center,Chinese Academy of Sciences,Xi'an 710600,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101048,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 [4]中国科学院国家授时中心,西安710600 [5]中国科学院大学天文与空间科学学院,北京101048

出　　处：《低温与超导》2021年第7期97-102,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金项目(11873079)资助。

摘　　要：微波真空窗是宽频带低温接收机的关键部件,直接影响接收机的噪声温度。本文对馈源辐射张角、材料介电常数、大气压力等关键参数进行分析研究。通过理论设计、计算仿真、实验测试,完成了1.2~9 GHz宽频低温接收系统的大口径低损耗微波真空窗的研制,插损≤0.2 dB。突破了大口径馈源制冷的关键技术,解决了宽频低温接收系统噪声温度≤50 K的技术难题。Microwave vacuum window is the key component of wideband cryogenic receiver, which directly affects the noise temperature of receiver. In this paper, the key parameters such as radiation angle of feed, dielectric constant of material and atmospheric pressure were analyzed and studied.Through theoretical design, calculation simulation and experimental test, a large-aperture low-loss microwave vacuum window in cryogenic receiving system at 1.2 to 9 GHz broadband was developed, and the insertion loss was less than 0.2 dB. The key technology for cooling large aperture feed source and the requirement of noise temperature below 50 K were solved.

关 键 词：大口径 低损耗 馈源张角 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]