基于功率合成技术的166GHz大功率源研制
投稿时间:2018-01-21  修订日期:2018-04-28  点此下载全文
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作者单位E-mail
孟进 中国科学院国家空间科学中心 mengjin@mirslab.cn 
张德海 中国科学院国家空间科学中心  
蒋长宏 中国科学院国家空间科学中心  
姚常飞 南京信息工程大学电子与信息工程学院  
中文摘要:冰云探测对于提高天气预报准确性、监测极端天气现象等具有重要的意义。考虑到冰云粒子尺寸、形状分布等因素,利用太赫兹频段被动遥感仪器能更好的解决冰云探测的难题。664GHz作为一个重要的探测频点,其接收机射频前端主要包括664GHz二次谐波混频器、332GHz二倍频器以及166GHz大功率源。本文在太赫兹二倍频设计的基础上,利用两路功率合成技术实现166GHz大功率源,目的是提供给后级的332GHz二倍频器足够的输入功率,从而能够驱动谐波混频器工作。实验结果表明,上述大功率源在164~172GHz频率范围内输出功率大于46mW;在168GHz处有最大输出功率59mW。以上研究有效解决了本振链路中G波段输出功率不足的问题,为研制更高频段的太赫兹系统提供了技术支撑。
中文关键词:功率合成技术  二倍频  大功率源
 
Design of a 166GHz high power source based on power-combined technology
Abstract:Ice clouds measurement technology plays an important role in improving the accuracy of the weather forecast and monitoring extreme weather phenomena and so on. Considering the physical dimension and shape distribution of ice-cloud particles, the problem of ice-clouds detecting could be solved by using terahertz passive remote sensing instrument. As an important detecting channel, the 664GHz RF front-end of receiver mainly includes a 664GHz sub-harmonic mixer, a 332GHz doubler and a 166GHz high power source. Based on the design of terahertz doubler, a 166GHz high power frequency multiplying source has been realized by using two way power-combined technology. The measured results show that the output power of above-mentioned source is more than 46mW in 164~172GHz and the highest output power is 59mW at 168GHz. The above-mentioned research could solve the problem of lacking of the G band high power source in the LO chain, and provide technical support for the design of terahertz system working at higher frequency.
keywords:power-combined technology  doubler  high power source
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