高带外抑制微带带通滤波器设计  

Design of High Out-of-band Rejection Microstrip Bandpass Filter

作　　者：周钰鑫 屈德新[2] 钟兴建[2] 李坤[3] 

机构地区：[1]解放军理工大学通信工程学院研究生3队,江苏南京210007 [2]解放军理工大学通信工程学院 [3]解放军理工大学通信工程学院研究生2队

出　　处：《军事通信技术》2015年第4期38-40,102,共4页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61271105)

摘　　要：文章介绍了发夹型滤波器的设计方法,并基于此方法设计了一种具有高带外抑制性能的新颖带通滤波器。该滤波器将微带线谐振器放置在双层介质板上下两面,以减小表面波影响,提高频率选择性。HFSS电磁仿真软件展示了滤波器的优化过程。仿真数值验证表明,所设计的滤波器在距中心频率700 MHz处的正向传输系数可达到-100dB以上,表现出良好的带外抑制特性。The method of narrowband filter design was introduced. Based on this method, a high rejection bandpass filter with novel hairpin microstrip structure was designed. In order to improve the frequency selection, the given filter structure can be obtained by placing the microstrip resonators onto both sides of the dielectric slab. The process of filter optimization by HFSS was shown. Compared with the simulation result, the out-of-band rejection at 700 MHz to the center frequency of the filter designed is more than 100 dB. Its performance is better than expectation.

关 键 词：高抑制 发夹型谐振器 微带带通滤波器 

分 类 号：TN713[电子电信—电路与系统]