超导混频接收中全固态本振的若干关键技术研究

项目名称： 超导混频接收中全固态本振的若干关键技术研究

项目编号： No.11303004

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 杨非

作者单位： 东南大学

项目金额： 25万元

中文摘要： 随着天文观测和大气探测对接收越来越有着高分辨率及高灵敏度的要求，本振对于系统低频噪声的贡献渐渐受到关注。拟开展超导混频接收中全固态本振的关键技术研究，分别是本振基准源低频噪声分析及低频噪声减小技术研究、高功率倍频器件热电模型及倍频器件低频噪声分析等内容。 在太赫兹波波段，若采用蓝宝石振荡器作为THz固态源的微波基准源，所输出THz信号低频噪声性能优异，可降低本振基准源低频噪声，有效减少其对后续本振倍频链路及超导混频电路的低频噪声引入。 高功率THz倍频输出以及THz链路低频噪声的特性分析，是全固态源研究面临的新问题。亟需开展对倍频机理的再讨论，即高功率THz倍频器件热电模型研究，进一步完善THz倍频电路特性分析与电路设计流程，完成高功率倍频电路优化设计以及低频噪声特性分析，有效提高系统稳定性。 本项目研究及其结论可作THz本振设计、系统测试及观测策略优化的参考依据。

中文关键词： 超低相噪基准源；锁频电路；功率合成倍频器；热电模型；

英文摘要： With the high resolution and high sensitivity requirements to astronomical observations and atmospheric sounding, the LO's contribution to the low frequency noise performance of the receiving system are the ongoing focus of these areas. We propose two key issues to be carried out about the solid-state local oscillator in superconducting mixer receiver research. They are the low frequency noise analysis of the local oscillator reference & noise-reduction technology, and the thermoelectric model of the high power local oscillator frequency multiplying devices & its low-frequency noise analysis separately. Using the sapphire oscillator as a microwave reference in the THz solid source source, the Output THz signal has a merit of low frequency noise performance. We intends to carry out theoretical model analysis of the noise-reduction & frequency-locking loop design techniques to accomplish a ultra-low phase noise circuit design which can reduce the low frequency noise of the local oscillator reference itself and low frequency noise introduced to the frequency multipliers. To THz multiplier's research, the high power THz multiplier and its low frequency noise characteristics is the new critical facing issue. We intend to carry out the thermoelectric model analysis of the high power THz frequency multiplier and

英文关键词： ultra-low phase noise fundmental source；frequency locking circuit；power combining doubler；thermoelectric model；