| 基于DGS和SIR单元的超宽阻带低通滤波器设计 |
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| 引用本文： | 杨维明.基于DGS和SIR单元的超宽阻带低通滤波器设计[J].电子器件,2012,35(6):746-750. |
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| 作者姓名： | 杨维明 |
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| 作者单位： | 湖北大学物理学与电子技术学院;武汉滨湖电子有限责任公司 |
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| 基金项目： | 湖北大学教学建设项目(201220) |
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| 摘 要： | 为了解决传统的微带线低通滤波器尺寸偏大,阻带较窄的问题,采用阶梯阻抗谐振(SIR)单元加载哑铃型缺陷地结构(DGS)单元设计了一个五阶微带低通滤波器,并通过在主传输线两侧添加并联开路枝节,以补偿DGS微带线的特性阻抗。测试结果表明:该滤波器结构尺寸21.6mm×8mm,3dB截止频率4GHz,通带内平均驻波比小于1.5,阻带范围5GHz～35GHz。实现了滤波器结构尺寸的减小和超宽阻带。
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| 关 键 词： | 微带低通滤波器 超宽阻带 缺陷地结构 特性阻抗补偿 |
The Design of Super-wide Stop-band Micro-strip Low-pass Filter Based on Defected Ground Structure and Stepped Impedance Resonant Units |
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| HU Chengkang,YANG Weiming,YANG Wutao,XIE Chuo,CAO Xiongfei.The Design of Super-wide Stop-band Micro-strip Low-pass Filter Based on Defected Ground Structure and Stepped Impedance Resonant Units[J].Journal of Electron Devices,2012,35(6):746-750. |
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| Authors: | HU Chengkang YANG Weiming YANG Wutao XIE Chuo CAO Xiongfei |
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| Affiliation: | 1(1.The School of Physics and Electronic Technology,Hubei University,Wuhan 430062,China; 2.Wuhan Binhu Electronics Company of Limited Liability,Wuhan 430077,China) |
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| Abstract: | To solve the problem that the area of the conventional micro-strip low-pass filter is large and its stop-band is narrow. A 5 order low pass filter was designed by using 3 defected ground structure (DGS) units loaded by 2 stepped impedance resonant (SIR) units. In order to compensate the characteristic impedance loss led by DGS, the shunt branch was added on the side of the main micro-strip line at each port of the filter. The measured results show that the size of the filter is 21.6mm×8mm, the cut-off frequency is 4GHz, the mean VSWR is less than 1.5 at pass-band, the stop-band is from 5GHz to 35GHz. The filter with a compact structure and super wide stop-band was realized. |
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| Keywords: | micro-strip low-pass filter super wide stop-band defected ground structure characteristic impedance compensation |
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