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基于λ/4和非对称λ/2谐振器的三阶微带滤波器设计
Three-pole microstrip bandpass filters with high selectivity using mixed λ/4 and asymmetric λ/2 resonators
投稿时间:2016-08-22  修订日期:2016-09-16
中文关键词:三阶带通滤波器  微带滤波器  梳状线谐振器  非对称准梳状线谐振器  电容加载
英文关键词:three-pole bandpass filters  microstrip filters  combline resonators  asymmetric quasi-combline resonators  capacitor-loaded
基金项目:
作者单位
赵志远 Academy of National Defense InformationWuhan Hubei 430000, China 
朱 璇 Academy of National Defense InformationWuhan Hubei 430000, China 
周学全 Academy of National Defense InformationWuhan Hubei 430000, China 
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中文摘要:
      提出了一种基于电容加载 λ/4 梳状线谐振器和电容加载非对称 λ/2准梳状线谐振器的三阶耦合滤波器拓扑结构。利用奇偶模方法,给出并分析了整个滤波器结构的等效电路,由导纳矩阵可以得出传输零点的位置。实际制作了一个中心频率为1.83 GHz的三阶微带带通滤波器,相对带宽为9%,带内中心插损仅为1.45 dB,回波损耗优于14 dB。传输响应在通带两侧分别存在一个传输零点,有利于提高滤波器的选择性。实验结果表明,测试结果与仿真结果基本一致。
英文摘要:
      A novel three-pole microstrip bandpass filter using mixed capacitor-loaded asymmetric quasi-combline and combline resonators is proposed. The equivalent circuit of the design is demonstrated and analyzed based on odd- and even-mode method in detail. According to the overall equivalent circuit, two transmission zeros can be introduced at both sides of the passband,which improves the selectivity significantly. The measured central frequency in the passband of the fabricated filter is 1.83 GHz,and the relative bandwidth is 9%. The insertion loss is only 1.45 dB with its return loss better than 14 dB. The measured results show good agreement with the simulated ones.
引用本文:赵志远,朱 璇,周学全.基于λ/4和非对称λ/2谐振器的三阶微带滤波器设计[J].太赫兹科学与电子信息学报,2017,15(6):997~1003
DOI:10.11805/TKYDA201706.0997
学科分类代码:
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