一种小型化腔体带阻滤波器的设计

Design of a Compact Band Stop Cavity Filter

腔体滤波器由于具有结构牢固,性能稳定可靠,散热性好,品质因数(Q)高,损耗小及功率容量高等特点,使其在各类微波系统中得到广泛运用。为了使某腔体带阻滤波器小型化,在保证阻带带宽大于200 MHz和阻带抑制大于30 dB的情况下,通过优化谐振腔的电容加载结构及优化谐振腔的排列方式,将滤波器的高度降低了50%,长度减小了17%,体积控制在8 mm×8 mm×25 mm。

For its firm structure,stable performance,good heat dissipation,high Q value,low loss and high power handing capability,the cavity filters are widely used in various microwave systems.In order to miniaturize the cavity band stop filter and ensure the stop band bandwidth of greater than 200 MHz and the stop band suppression of greater than 30 dB,by optimizing the capacitor loading structure of the resonator and optimizing the arrangement of the resonant cavity,the height of the filter is reduced by 50%and the length is reduced by 17%,and the volume is controlled at 8 mm×8 mm×25 mm.