The Cavity Asana Band-pass Filter Research And Design

With the rapid development of the mobile communication industry , the electronic countermeasure and the technologies of navigation in recent years,the demand of new microwave components and the requirement of improving the quality of the existing microwave components are very high.Therefore the Microwave Band-pass filter, as an important microwave component, is well developed in recent years. Domestic and foreign engineers are very interested in the research of Microwave filters theory and practical design for the microwave filters.This paper chooses cavity asana band-pass filter as research object, combining the method of the synthetic classic formula with computer simulation tools to study, therefore simplifies the design process, and improve the accuracy of designing and machining. In the process. The study mainly includes several aspects:1.tarting from the network design theory of filter, based on coupling resonator band-pass filter theory, this paper studies the design process developed from Low-pass prototype filter to Coupling resonance cavity adjustable band-pass filter.2. To design cavity band-pass filter, this paper researches and analyzes the relationship between filter frequency variation and filter performance parameters. As a result, it finds out the designing formula.3. According to the design index, this research makes use of Chebyshev function band-pass filter, and uses HFSS simulation software to simulate and optimize the initial geometric parameters to get the final value of geometric parameters of filter, so it can meet its original design requirements. The final simulation results demonstrate the feasibility and practicability of this method.