高温超导谐振器与滤波器的微调研究  

Investigation of Micro-tuning HTS Resonator and Filter

作　　者：金世超[1] 魏斌[1] 曹必松[1] 郭旭波[1] 朴云龙[1] 彭慧丽[1] 高葆新[2] 

机构地区：[1]清华大学物理系,北京100084 [2]清华大学电子工程系,北京100084

出　　处：《微波学报》2007年第4期47-50,共4页Journal of Microwaves

基　　金：国家自然科学基金资助项目(60471001)

摘　　要：高温超导滤波器采用的基底的介电常数和厚度与模拟设计值往往存在一定差异,从而导致实际制作的滤波器的中心频率和频带偏离设计值。本文提出了解决这一问题的新思路,在原有高温超导滤波器上进行微调,即对组成滤波器的每个谐振器的局部进行相同的微小结构改变,使谐振器频率偏移,进而使滤波器的整个频带发生偏移。并利用该方法对多种谐振器和四节前向耦合高温超导滤波器进行了模拟,发现数值模拟数据与理论曲线符合得很好。这一方法对于窄带高温超导滤波器尤其具有重要的意义。A central frequency shift is usually observed between the measured response and simulated response for a HTS filter. The difference is mainly attributable to the variation of material parameters of the substrate （ permittivity and thickness） and the thickness of the film from the assumed values. To solve this problem, we have put forward a new microtuning model in this paper. In the model, a slight local change of resonator configuration was made to realize the offset of the central frequency shift. The model has been applied to simulate several types of resonators and a 4-pole HTS filter with a narrow pass-band, and good agreement was found between the theoretical curves and simulated data.

关 键 词：高温超导 谐振器 滤波器 调谐 

分 类 号：TN713[电子电信—电路与系统]