基于齿状缺陷地的宽阻带交叉耦合SIW滤波器
Wide Stopband Cross-Coupled SIW Filter Based on Tooth-Shaped Ground Defect
佘金川 1吴志强 1王凯 1陈耀忠 1陈言 1李正雄 1张胜2
作者信息
- 1. 北方信息控制研究院集团有限公司,江苏 南京 211153
- 2. 中国矿业大学信息与控制工程学院,江苏 徐州 221116
- 折叠
摘要
提出了一种齿状缺陷地低通传输线结构,该低通传输线由多级齿状缺陷地构成,通过调节齿状缺陷地枝节长度,可以有效调节低通和阻带频率范围.利用该齿状缺陷地结构,级联交叉耦合扇形基片集成波导(SIW)滤波器,该文设计了一款高带外抑制的宽阻带滤波器,与传统 SIW带通滤波器相比,其矩形系数K40 dB =2,阻带范围大于 2 倍的中心频率,具有较好的通带和阻带选择特性.测试结果表明,滤波器的中心频率为 10.35 GHz,3 dB和 40 dB带宽分别为 507 MHz和 1.05 GHz,插入损耗优于 1.47 dB,与仿真结果基本一致.
Abstract
A low-pass transmission line structure with multi-level,tooth-shaped defects is proposed.The low-pass frequency and attenuation-band range could be effectively adjusted by varying the length of the branch of atooth-shaped defect.A wide-stopband filter with high out-of-band suppression was designed by cascading cross-coupled fan-shaped SIW filters using this tooth-shaped defect ground structure.Compared to traditional SIW bandpass fil-ters,the rectangular coefficient,K40 dB,had a value of two,and the stopband range was greater than twice the cen-ter frequency,demonstrating good passband and stopband selection characteristics.The test results showed that the filter's center frequency was 10.35 GHz,with 3 dB and 40 dB bandwidths of 507 MHz and 1.05 GHz,respectively.The insertion loss was better than 1.47 dB,which was consistent with the simulation results.
关键词
缺陷地结构/基片集成波导/交叉耦合/滤波器/宽阻带Key words
DGS structure/substrate integrated waveguide/cross-coupled/filter/wide stopband引用本文复制引用
基金项目
中央高校基本科研业务费专项(2019GF12)
出版年
2024
NETL
NSTL
万方数据