文章摘要
曹海林,管伟,何思佳,杨力生.G形DMS结构高选择性低通滤波器的分析与设计[J].高技术通讯(中文),2013,23(3):313~317
G形DMS结构高选择性低通滤波器的分析与设计
Design and analysis of a G shaped DMS lowpass filter with high selectivity
  
DOI:
中文关键词: 缺陷微带结构(DMS), G形, 微带低通滤波器, 选择性, 宽阻带
英文关键词: defected microstrip structure (DMS), G shaped structure, microstrip lowpass filter, selectivity, wide stopband
基金项目:国家自然科学基金(61001089)和重庆市科委自然科学基金(2010BB2243)资助项目
作者单位
曹海林 重庆大学飞行器测控与通信教育部重点实验室
重庆大学 通信与测控中心 
管伟 重庆大学飞行器测控与通信教育部重点实验室 
何思佳 重庆大学飞行器测控与通信教育部重点实验室 
杨力生 重庆大学飞行器测控与通信教育部重点实验室
重庆大学 通信与测控中心 
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中文摘要:
      提出一种新颖的G形缺陷微带结构(DMS)微带线,以G形DMS为结构单元,设计并实现了一种具有高选择性和宽阻带特性的微带低通滤波器。与传统的DMS结构相比,G形DMS具有更低的谐振频率和更宽的阻带抑制。对设计的滤波器进行了测试,实测结果表明:该滤波器3dB截止频率为3.17GHz,频率选择性达189dB/GHz,同时在3.4GHz~10GHz阻带内抑制度大于25dB,有效地抑制了二次和三次谐波。该滤波器占用大小仅为26mm×15mm,实测结果与仿真良好吻合, 表明了该DMS的有效性及实用性。
英文摘要:
      A novel G shaped defected microstrip structure (DMS) was proposed, and a microstrip lowpass filter with the superior selectivity and wide stopband was designed and fabricated using the proposed DMS as its structrual units. Compared with the conventional DMS, the proposed G shaped DMS exhibits a lower resonant frequency and a wider stopband. The lowpass filter was tested and measured, and the results showed that its 3dB cutoff frequency was 3.17GHz, the frequency selectivity was 189dB/GHz, and the harmonic suppression was over 25dB in the stopband of 3.4GHz~10GHz, so the second and third harmonics can be effectively suppressed. The dimension of this filter is as small as 26mm×15mm. The measured and simulated results are in good agreement, validating the effectiveness and practicality of the DMS.
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