一种基于介质集成波导腔的小型化滤波器  

Compact filter based on substrate integrated waveguide cavities

作　　者：方志华[1] 张忠海[1] 

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《现代电子技术》2012年第21期65-67,70,共4页Modern Electronics Technique

基　　金：国家自然科学基金(60673143)

摘　　要：为了实现介质集成波导滤波器的进一步小型化,通常要改进其谐振腔;通过在传统的介质集成波导谐振腔中心位置插入一个短路销钉,并且将其上金属平面与腔体四周的金属壁绝缘可以实现其体积的小型化。采用这种小型化谐振腔,设计了四腔微带滤波器,工作在2.8GHz,相对带宽14.3%。最终加工了这个原型滤波器,仿真和测试结果吻合良好。相比采用传统的介质集成波导谐振腔的滤波器,这个滤波器尺寸可以减小到其1/4以下。To achieve the further miniaturization of substrate integrated waveguide filter, some improvements usually are made to the resonator of the substrate integrated waveguide. By inserting a shorting pin to the centre of the conventional sub- strate integrated waveguide cavity and insulating the top metal plane of the substrate integrated waveguide cavity from the metal side-wall around the cavity, a compact substrate integrated waveguide cavity is achieved. Then a four-cavity bandpass filter which adopts the compact substrate integrated waveguide cavity operating well in 2.8 GHz with 14.3 ~ fractional band- width is designed. Finally, a prototype filter is fabricated and tested. The simulation result is consistent with the measured one. The size of the proposed filter is reduced down to a quarter of the filter with the adoption of traditional substrate integrated waveguide cavity.

关 键 词：介质集成波导腔 带通滤波器 小型化滤波器 介质集成波导腔滤波器 

分 类 号：TN713[电子电信—电路与系统]