基于折叠型谐振结构的宽带带阻滤波器的设计
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摘要
基于三组折叠型谐振结构设计出一款紧凑宽带带阻滤波器。首先,对折叠型谐振结构的特性进行分析,结果表明,该结构具有传输零点,且该传输零点具有可调节性。之后,通过分析折叠型谐振结构之间的间隔影响,得到较为合适的间距。在此基础上,通过增加另一组折叠型谐振结构的形式,设计得到了宽带带阻滤波器。仿真结果表明,该滤波器的10-d B工作带宽为1.98 GHz。通过仿真优化,得到一款采用三组折叠型谐振结构的宽带带阻滤波器。将该滤波器进行加工并测试,结果表明,滤波器的工作带宽为2.41 GHz。此外,为了进一步说明该结构的滤波特性,我们对其等效电路进行了分析。由于采用了折叠型结构,所以这款滤波器具有小型化的特性。
A compact wideband bandstop filter composed of three pairs of folded resonators is presented. Firstly,analyzing the characterization of one pair of folded resonators it is found that the structure linked with a pair of folded resonators exhibits adjustable transmission zeros. Then,analyzing the effect of the distance between folded resonators an appropriate distance is got. What's more,through adopting another pair of folded resonators,a wider band bandstop filter is achieved. Simulated results demonstrate that the 10-d B bandwidth is 1.98 GHz. After optimization,a wideband bandstop filter adopting three pairs of folded resonators has been fabricated and measured. The results show that the bandwidth is 2.41 GHz. In addition,in order to explain the mechanism of proposed structure,the equivalent circuit is also analyzed. The length and width of structure get reduced owing to the folded shape.
A compact wideband bandstop filter composed of three pairs of folded resonators is presented. Firstly,analyzing the characterization of one pair of folded resonators it is found that the structure linked with a pair of folded resonators exhibits adjustable transmission zeros. Then,analyzing the effect of the distance between folded resonators an appropriate distance is got. What's more,through adopting another pair of folded resonators,a wider band bandstop filter is achieved. Simulated results demonstrate that the 10-d B bandwidth is 1.98 GHz. After optimization,a wideband bandstop filter adopting three pairs of folded resonators has been fabricated and measured. The results show that the bandwidth is 2.41 GHz. In addition,in order to explain the mechanism of proposed structure,the equivalent circuit is also analyzed. The length and width of structure get reduced owing to the folded shape.
引文
[1]Chen Fu-Chang,Li Run-Shuo,Qiu Jie-Ming,et al.Sharp-Rejection Wideband Bandstop Filter Using Stepped Impedance Resonators[J].IEEE Transactions on Components,Packaging and Manufacturing Technology,2017,7(3),444-449.
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[3]Ka Wai Wong,Raafat R Mansour,Gareth Weale.Reconfigurable Bandstop and Bandpass Filters with Wideband Balun Using IPD Technology for Frequency Agile Applications[J].IEEE Transactions on Components,Packaging and Manufacturing Technology,2017,7(4),610-620.
[4]Hui Chen,Di Jiang,Xu Chen.Wideband Bandstop Filter Using Hybrid Microstrip/CPW-DGS with via-Hole Connection[J].Electronics Letters,2016,52(17),1469-1470.
[5]Satish Chand Gupta,Mithilesh Kumar,Ram Swaroop Meena.Design&Analysis of a Microstrip Line Multi Band UWB Filter[J].AEUInternational Journal of Electronics and Communications,2016,70:1556-1564.
[6]Amir Ebrahimi,Said F Al-Sarawi,Derek Abbott.Compact SecondOrder Bandstop Filter Based on Dual-Mode Complementary SplitRing Resonator[J].IEEE Microwave and Wireless Components Letters,2016,26(8):571-573.
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[9]Lee Seungjin,Oh Sangyeol,Yoon Won-Sang,et al.A CPW Bandstop Filter Using Double Hairpin-Shaped Defected Ground Structures with a High Q Factor[J].Microwave And Optical Technology Letters,2016,58(6):112-133.
[10]Pankaj Sarkar,Manimala Pal,Rowdra Ghatak.A Compact Dual Stopband Bandstop Filter Using Defected SIR and Hilbert Shape Fractal Structure[J].Microwave and Optical Technology Letters,2016,58(6):1345-1347.
[11]Xiao J K,Zhu Y F.Multi-Band Bandstop Filter Using Inner TShaped Defected Microstrip Structure(DMS)[J].AEUInternational Journal of Electronics and Communications,2014,68(2):90-96.
[12]Rajendra Dhakal,Kim Nam-Young.A Compact Dual-Band Bandstop Filter Using a Circular,Folded,Symmetric,Meandered-Line,Stepped-Impedance Resonator[J].Microwave and Optical Technology Letters,2014,56(10):323-344.
[13]Che Wenquan,Feng Wenjie,Deng Kuan.Microstrip Dual-Band Bandstop Filter of Defected Ground Structure and Stepped Impedance Resonators[J].International Journal of Electronics,2010,97(11):1351-1359.
[2]Anwesha Choudhury,Santanu Maity.Design and Fabrication of CSRR Based Tunable Mechanically and Electrically Efficient Band Pass Filter for K-Band Application[J].AEU-International Journal of Electronics and Communications,2017;72;134-148.
[3]Ka Wai Wong,Raafat R Mansour,Gareth Weale.Reconfigurable Bandstop and Bandpass Filters with Wideband Balun Using IPD Technology for Frequency Agile Applications[J].IEEE Transactions on Components,Packaging and Manufacturing Technology,2017,7(4),610-620.
[4]Hui Chen,Di Jiang,Xu Chen.Wideband Bandstop Filter Using Hybrid Microstrip/CPW-DGS with via-Hole Connection[J].Electronics Letters,2016,52(17),1469-1470.
[5]Satish Chand Gupta,Mithilesh Kumar,Ram Swaroop Meena.Design&Analysis of a Microstrip Line Multi Band UWB Filter[J].AEUInternational Journal of Electronics and Communications,2016,70:1556-1564.
[6]Amir Ebrahimi,Said F Al-Sarawi,Derek Abbott.Compact SecondOrder Bandstop Filter Based on Dual-Mode Complementary SplitRing Resonator[J].IEEE Microwave and Wireless Components Letters,2016,26(8):571-573.
[7]Feng Wenjie J,Hong Meiling L,Che Wenquan Q,et al.Dual-Band Microstrip Bandstop Filter with Multiple Transmission Poles Using Coupled Lines[J].IEEE Microwave and Wireless Components Letters,2017:1-3.
[8]Zhang Cheng,Geng Jun-Ping,Jin Rong-Hong,et al.Dual-Wideband Bandstop Filter Using Stepped Impedance Coupled-Lines[J].Microwave And Optical Technology Letters,2015,57(10):2304-2306.
[9]Lee Seungjin,Oh Sangyeol,Yoon Won-Sang,et al.A CPW Bandstop Filter Using Double Hairpin-Shaped Defected Ground Structures with a High Q Factor[J].Microwave And Optical Technology Letters,2016,58(6):112-133.
[10]Pankaj Sarkar,Manimala Pal,Rowdra Ghatak.A Compact Dual Stopband Bandstop Filter Using Defected SIR and Hilbert Shape Fractal Structure[J].Microwave and Optical Technology Letters,2016,58(6):1345-1347.
[11]Xiao J K,Zhu Y F.Multi-Band Bandstop Filter Using Inner TShaped Defected Microstrip Structure(DMS)[J].AEUInternational Journal of Electronics and Communications,2014,68(2):90-96.
[12]Rajendra Dhakal,Kim Nam-Young.A Compact Dual-Band Bandstop Filter Using a Circular,Folded,Symmetric,Meandered-Line,Stepped-Impedance Resonator[J].Microwave and Optical Technology Letters,2014,56(10):323-344.
[13]Che Wenquan,Feng Wenjie,Deng Kuan.Microstrip Dual-Band Bandstop Filter of Defected Ground Structure and Stepped Impedance Resonators[J].International Journal of Electronics,2010,97(11):1351-1359.