极窄带均衡群时延超导滤波器级联机理的研究

The research about cascade mechanism of ultra-narrowband superconducting filter with group delay equalization is introduced by using the method of low order cascade network in this project, in order to solve high order and difficult to have ideal transmission and reflection performances of narrowband superconducting filter with group delay equalization. The principle of using cascade network to design narrowband equilibrium group delay superconducting filter is presented preliminary which is by mean of analyzing the electromagnetic characterstics change of low order group delay superconducting filter after throught the cascade network. Meanwhile a new method can be attained, which not only satisfy the characteristics of narrow band equilibrium group delay but also reduces the order of superconducting filter. The project has unique research ideas, viable theory and high value application, on the other hand, the implementation of the projec will be laid the technical foundation for the research and development of high performance superconductor system.

本项目针对目前极窄带均衡群时延超导滤波器的阶数高、难以保证在获得较为理想的传输特性和反射特性的同时，又获得均衡群时延特性的问题,进行极窄带均衡群时延超导滤波器的级联机理的研究。通过研究分析低阶群时延超导滤波器通过网络级联后群时延等电磁特性的变化，初步阐明级联法设计极窄带均衡群时延超导滤波器的原理，实现用相对成熟和简单的的低阶均衡群时延超导滤波器构建高性能极窄带均衡群时延超导滤波器，获得一种既能满足窄带均衡群时延特性又能降低超导滤波器的阶数的新途径。项目研究思路独特、理论可行、应用价值高，项目的实施将在技术上为研究开发高性能超导系统打下技术基础。

本项目以六阶线性相位超导滤波器为基础，开展了极窄带均衡群时延超导滤波器的级联特性的相关研究。综合出三个网络级联后网络的S矩阵，分析出级联网络和两六阶线性相位超导滤波器的网络特性的影响，根据级联后网络S参量电磁特性的变化，通过合理的选择和调整可构建出移相器网络结构形式的级联网络，实现极窄带均衡群时延超导滤波器，该项目的研究提供一种新的技术思路，将在技术上为研究开发高性能超导系统打下技术基础。