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.
出处
《科学技术与工程》
北大核心
2013年第34期10318-10321,共4页
Science Technology and Engineering
关键词
双模双通带
对称T型支节
奇偶模分析
dual-mode dual-band
symmetric T-shape stubs even and odd mode analysis
