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基于双频谐振器的小型化双频滤波器设计

Design of Miniaturized Dual-Band Bandpass Filter Based on Dual-Band Resonator
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摘要 本文提出一种设计小型化、低损耗、双通带的带通滤波器的新方法,主要利用双频谐振器能够同时工作于两个频段的特点,通过合理设计使谐振器间的耦合结构和馈电点位置在两个频段上具有相同的结构参数,从而实现小型化双频滤波器.为验证该方法的可行性,设计了一种基于阶跃阻抗谐振器(SIR)结构的双频滤波器.该滤波器工作频率为2.4 GHz和5.2 GHz,回波损耗都低于-20 dB,插入损耗小于1 dB,相对带宽FBW均为20%,尺寸为6 mm×15 mm(0.08λg1×0.19λg1).对该滤波器进行了仿真、加工和测试,发现测量和仿真的结果具有很好的一致性. In this paper, to design a miniaturized and lowloss dual-band bandpass filter （DBB- PF）, a novel method is proposed. Utilizing the characteristic of the dual-band Resonators which oper- ate at two desired frequencies synchronously, we make the value of coupling configuration and feeding point are equal respectively at the two resonating frequencies by properly designing to realize minia- turized dual-band bandpass filter. To prove the viability of the method, we designed a dual-band filter basing on the stepped impedance resonators （SIR）. The filter works at 2.4 GHz and 5.2 GHz, the re- turn loss in the pass band is better than - 20 dB, the insert loss is low than 1 dB, the relative band- width is about 20 %, and a very small size of 6 mm ×15 mm （0.08λ1 × 0.19 2λg ）. Finally the filter is fabricated and measured. The measured results agree well with the simulated ones.
作者 梁学亮 张亚男 马润波 韩丽萍
机构地区 山西大学物理电子工程学院
出处 《测试技术学报》 2014年第2期168-172,共5页 Journal of Test and Measurement Technology
基金 国家自然科学基金资助项目(61172045) 国家基础科学人才培养基金资助项目(J1210036) 山西省自然科学基金资助项目(2012011013-3) 山西省青年科学基金资助项目(2010021015-1)
关键词 双频谐振器 双频滤波器 阶跃阻抗谐振器 λ 4短路微带线谐振器 小型化 dual-band resonator dual-band bandpass filter stepped impedance resonator λ/4 shorted microstrip resonator miniaturization
分类号 TN713.5 [电子电信—电路与系统]
  • 相关文献

参考文献10

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二级参考文献10

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测试技术学报
2014年 第2期

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