新型对称T型支节加载双模双通带微带滤波器  

A Novel Dual-mode Dual-band Microstrip Filter Loaded with Symmetric T-shape Subs

作　　者：胡昌海[1] 熊祥正[1] 吴彦良[1] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031

出　　处：《科学技术与工程》2013年第34期10318-10321,共4页Science Technology and Engineering

摘　　要：提出了一种新型对称T型开路支节加载的双模双通带滤波器,并对其进行了奇偶模和双模谐振器耦合原理分析。该滤波器的两个通带分别由奇模和偶模产生,且具有3个传输零点,在-25 dB以下的高端阻带达5 GHz,具有高选择性和宽阻带的特性,且滤波器的实测结果与仿真结果非常吻合。该双模滤波器与传统滤波器相比,在相同级数的情况下,尺寸减小近一半,在工程领域非常具有应用价值。A novel dual-mode dual-band bandpass microstrip filter loaded with symmetric T-shape subs is proposed,and the even-odd mode and the coupling principle of dual-resonator are analyzed.The two passbands of the filter are produced by the odd-mode resonant frequencies and the even-mode resonant frequencies respectively,which can obtain three transmission zeros,and the upper-stopband less than-25 dB attenuation is up to 5 GHz.So the filter has high selectivity and broad stopband.The measured results show good agreement with the simulated results.Compared with the conventional microstrip filters,the proposed dual-mode filter can significantly reduce the size of 50％ in the same order.So it has important application value.

关 键 词：双模双通带 对称T型支节 奇偶模分析 

分 类 号：TN713.5[电子电信—电路与系统]