随着无线通信向高频化、多频化、宽频化和可重构方向发展，通信系统迫切需要能够精准滤波、宽频率比范围、小尺寸、可重构且具有大功率容量的宽带多频滤波器。本项目以腔体宽带多频滤波器为研究对象，拟通过采用多阶级联的高次多模谐振腔和引入陷波机制的宽频多模谐振腔两种研究路线对以下几个内容进行研究：1、腔体多模谐振腔的谐振机理及小型化机理研究；2、多阶级联的小型腔体宽带多频滤波器综合设计研究；3、小型单腔宽带多频滤波器综合设计研究；4、小型腔体宽带多频滤波器可重构机制研究。本项目旨在建立宽频率比范围的小型腔体宽带多频滤波器综合设计理论并探明其可重构机制，为其在雷达、航空航天和移动通信等的宽带多频通信系统中的实际应用提供理论依据和技术支持。

With the development of wireless communication towards high-frequency, multi-frequencies, wideband and reconfigurable, communication systems urgently need multi-wideband bandpass filters with precise filtering, wide frequency ratio, compact, reconfigurable and high power handing. Based on cavity multi-wideband filters as the research object, by using multi-class high-order multi-mode resonant cavity and wideband multi-mode resonant cavity with introducing the notch mechanism, this project includes the following contents: 1. research on the resonant mechanism and miniaturization mechanism of cavity multi-mode resonant cavity; 2. research on the synthesis design of multi-class compact multi-wideband cavity filters; 3. research on the synthesis design of compact multi-wideband single cavity filters; 4. research on the reconfigurable mechanism of compact multi-wideband filters. This project aims to establish the theories of synthesis design and reconfigurable for compact cavity multi-wideband filters with wide frequencies ratio range and prove up the mechanism of the reconfigurable, and provide theoretical basis and technical support for its application in radar, avigation, spaceflight and mobile multi-wideband communication systems.