Research On Synthesis Method Of Filters And Exploration Of Topologies With Non-resonating Nodes

The synthesis of filters with Non-Resonating nodes,for now,is still an immature technology.Although,the integrated approach for the conventional filter topologies is very mature,but the structure to produce cross-coupling of transmission zero is different from the general ones,so an integrated approach is no longer have the ability to complete the integrated synthesis individually,we must have some other ways to fix the tranditional method as carried out in this article.In recent years,at domestic and foreign,a lot of articles and synthesis technologies about the structure with Non-Resonating nodes have been published.And in this paper I will introduce them one by one.However,it have some limitations in these articles.Some of the methods introduced in these articles can only work in some particular situation or they can only be implemented by specific coupling element values.There are also some classic groundbreaking articles in them.Our aim is to combine the classic papers,which digest the technical principles,then make some improvements on the basis of these articles.The main purpose of this paper is to summarize and explore the excellent,practical and universal synthesis approach.The focus of the paper is on the synthesis of the filters with Non-Resonating nodes,the writing of synthesis software and the transformation process of the synthesis results from the low-pass domain to the band pass domain.This paper aims to study the synthesis theory,design theory and the realization of the synthesis software,so I only pick the representative part of the chart of the Hfss three-dimensional design result for display.And this paper mainly uses Matlab software as a software writing tool,uses AWR,Hfss as the verification tool of two-dimensional or three-dimensional circuit.The focus of this paper is as follows:(1).The traditional synthesis theory of the filter has been discribed.But I only make a rough description of the traditional theory and my personal understanding of it.(2).The synthesis theory of filter with Non-Resonating Nodes has been represented.I will describe the method of synthesizing filter with Non-Resonating Nodes in detail step by step.The synthesis process is start from the analysis of the S parametre of filter.(3).I will also make a theoretical description of the procedure of the realization of filter.The description in this paper will focus on the influences of parameter transformations of coupling coefficients and resonanting frequencies from the low-pass to the band-pass domain.(4).The description of the process of programme design and verification of the synthesis software will be made.Though I can't copy the program statement line-by-line,I will represent the key part of it.Also,a detail description of the verification procedure of the softwar will be made in the latter part of this paper by 2-D and 3-D simulation.This is not only the verification of software,but also an exploration of the performance of filter with Non-Resonating Nodes.