摘要
设计了一种采用折叠双模谐振器结构的新型双模微带带通滤波器。通过在折叠双模谐振器两侧加载交叉耦合结构,使通带两端产生一对传输零点。实验结果表明,该滤波器具有结构紧凑,体积小,损耗低,带外抑制性能好等优点,且其中心频率为3.65GHz,通带为2.5～4.8GHz,最大回波损耗优于-33.5dB,最小插入损耗为-0.18dB,实测结果和仿真结果相吻合。
A novel microstrip bandpass filter with the folded dual-mode resonator structure is designed.The cross coupling structure loaded at both sides of folded dual-mode resonator of the filter is used to generate a pair of transmission zeros at the both ends of the pass band.The experimental results show that the filter has advantages of compact structure,small size,low loss and good rejection features outside of the pass band etc;the pass band of the filter is from 2.5 GHz to 4.8 GHz at the center frequency of 3.65 GHz,the maximum return loss surpasses-33.5dB,and the minimum insertion loss is-0.18 dB.The measurement result is consistent with the software simulation result each other.
出处
《压电与声光》
CAS
CSCD
北大核心
2015年第6期1057-1060,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(61131002)
关键词
微带带通滤波器
折叠双模谐振器
传输零点
插入损耗
交叉耦合结构
microstrip bandpass filter
folded dual-mode resonator
transmission zero
insertion loss
cross coupling structure
