新型通带可控低损耗小型四频带通滤波器设计  

Design of Novel Quad-band Bandpass Filter with Controllable Passband and Low Loss

作　　者：张友俊[1] 张颖[1] 

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《微波学报》2017年第6期35-38,共4页Journal of Microwaves

基　　金：国家自然科学基金(61131002)

摘　　要：提出了一种新型通带可控、损耗较低的四频带通滤波器结构。该滤波器的组成采用二阶新型多枝节加载四模谐振器。该谐振器有4个可单独控制的谐振模式,致使滤波器的中心频率可单独调控,通过控制两谐振器间的耦合系数,滤波器带宽可控。实验结果表明,该滤波器通带可控并满足小型化的要求,4个通频带中心频率是2.5/3.1/4/5.05 GHz,插入损耗为0.1/0.27/0.13/0.16 d B,每个通带的回波损耗都优于15 d B。实测结果与仿真结果一致。This paper presents a novel quad bandpass filter with controllable passband and low loss. The filter is com- posed of novel second-order multiple stub-loaded quad-mode resonators. The resonator＇ s four controllable modes cause the center frequency of the filter to be controllable individually. The bandwidths of the filter can be controlled by the coupling co- efficient between the two resonators. The experimental results show that the passband of the filter can he controllable and the size of the circuit meets the requirements of miniaturization. The center frequency of the four passband are 2.5 / 3.1 / 4 / 5.05 GHz and the insertion losses are 0.1/0. 27/0.13/0.16 dB. The return losses are better than 15dB. The measured re- sults are in agreement with the simulation results.

关 键 词：四频 带通滤波器 通带可控 低损耗 小型化 

分 类 号：TN713[电子电信—电路与系统]