一种耦合线加载的双通带滤波器
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摘要
提出一种基于耦合线加载的双通带滤波器,该滤波器在开口矩形环内部加载两根相互耦合的微带,从而产生两个通带。与加载单枝节的双通带滤波器相比,该滤波器在设计时有更多可变参数和更小的调节步进。比如当耦合线宽度不等步进变化时通带中心频率会向相反方向变化,这一性质可以用作对两通带之间的频率间隔进行微调。测试结果表明,该滤波器有两个通带,其中心频率分别为3.78 GHz和6.55 GHz,相对带宽分别为4.6%和4.8%。除此之外,还研究了调整加载耦合线的长度和宽度对滤波器频率特性的影响。仿真和实测结果之间良好的吻合证实了设计方法的有效性。
A novel dual-band bandpass filter based on loaded coupling lines is proposed in this paper, which loads two coupling micro-strips inside the split-ring resonators, and two passbands are generated by the filter. Compared with the ones which load single vertical lines, the proposed one has more parameters to be adjusted and smaller regulating steps in design. Such as center frequencies of the passbands change in the opposite directions when widths of the coupling lines are non-equidistant varied, which can slightly turn the interval between two passbands. According to the measurement results, the fabricated filter proposes two passbands whose center frequencies are 3.78 GHz and 6.55 GHz respectively and the fraction bandwidths are 4.6% and 4.8 % respectively. In addition, to facilitate the subsequent designs, the frequency characteristic variation of the filter cause by lengths and bandwidths of the coupling lines is also studied. Favorable agreements of simulation and measurement prove effectiveness of the proposed filter and the proposed design approach.
A novel dual-band bandpass filter based on loaded coupling lines is proposed in this paper, which loads two coupling micro-strips inside the split-ring resonators, and two passbands are generated by the filter. Compared with the ones which load single vertical lines, the proposed one has more parameters to be adjusted and smaller regulating steps in design. Such as center frequencies of the passbands change in the opposite directions when widths of the coupling lines are non-equidistant varied, which can slightly turn the interval between two passbands. According to the measurement results, the fabricated filter proposes two passbands whose center frequencies are 3.78 GHz and 6.55 GHz respectively and the fraction bandwidths are 4.6% and 4.8 % respectively. In addition, to facilitate the subsequent designs, the frequency characteristic variation of the filter cause by lengths and bandwidths of the coupling lines is also studied. Favorable agreements of simulation and measurement prove effectiveness of the proposed filter and the proposed design approach.
引文
[1] 张智翀,沈溧,姜杨,等.微波双带带通滤波器的研究与进展[J].华东交通大学学报,2010,27(2):45-52 Zhang Z C,Shen L,Jiang Y,et al.Research and development of microwave dual-band bandpass filter[J].Journal of East China Jiaotong University,2010,27(2):45-52
[2] 周丽,张祥军.基于新型阶跃阻抗谐振器的微带双带带通滤波器[J].固体电子学研究与进展,2013,33(6):557-560 Zhou L,Zhang X J.A novel design of microstrip dual band-pass filter based on stepped impedance resonators[J].Research & Progress of SSE,2013,33(6):557-560
[3] 陈畅,张忠祥,陈卫东.一种基于DGS结构的新型双模双通带滤波器[J].微波学报,2011,27(6):77-80 Chen C,Zhang Z X,Chen W D.A novel dual-mode dual-band bandpass filter based on DGS[J].Journal of Microwaves,2011,27(6):77-80
[4] 占腊民,陈芳胜,李文广.共面波导馈电的小型化双通带滤波器[J].微波学报,2017,33(4):52-54 Zhan L M,Chen F S,Li W G.Miniaturized dual-band bandpass filter using co-planar waveguide coupling structure[J].Journal of Microwaves,2017,33(4):52-54
[5] Duan Q ,Song K ,Chen F ,et al.Compact dual-band bandpass filter using simply hybrid structures[J].Electronics Letters,2015,51(16):1265-1266
[6] Fan Y ,Mo Y ,Tao P ,et al.Miniaturised dual-band bandpass filter using modified SIR[J].Electronics Letters,2013,49(14):888-890
[7] Song K ,Zhang F ,Fan Y .Miniaturized dual-band bandpass filter with good frequency selectivity using SIR and DGS[J].AEU - International Journal of Electronics and Communications,2014,68(5):384-387
[8] 罗杰,熊祥正,廖成.应用于WLAN的加载对称H型枝节的双通带滤波器[J].微波学报,2015,31(5):69-72 Luo J,Xiong X Z,Liao C.Design of a novel dual-band bandpass filter loaded symmetrical H-shaped stubs for WLAN application[J].Journal of Microwaves,2015,31(5):69-72
[9] 吴边,梁昌洪,苏涛.基于同步参数提取的缺陷环双通带滤波器设计[J].微波学报,2011,27(1):11-14 Wu B,Liang C H,Su T.Design of DSRR dual-band filter based on synchronous parameter extraction method[J].Journal of Microwaves,2011,27(1):11-14
[10] 张德锋,尹映辉.一种新颖微带双通带带通滤波器的设计方法[J].火控雷达技术,2009,38(4):91-94 Zhang D F,Yin Y H.A novel design method of microstrip dual bandpass filters[J].Fire Control Radar Technology,2009,38(4):91-94
[11] 刘新红.支节加载双模带通滤波器设计[J].无线电工程,2016,46(3):62-64 Liu X H.Dual-mode bandpass filter using stub-loaded resonator[J].Radio Engineering,2016,46(3):62-64
[12] Hong J S,Tang W.Dual-band filter based on non-degenerate dual-mode slow-wave open-loop resonators[A].IEEE MTT-S International Microwave Symposium[C],2009.861-864
[13] Chang K.Micro-strip filters for RF/microwave applications[M].Hoboken:John Wiley & Sons,Inc,2001
[14] Zhang X Y,Chen J X,Xue Q,et al.Dual-band bandpass filters using stub-loaded resonators[J].IEEE Microwave & Wireless Components Letters,2007,17(8):583-585
[2] 周丽,张祥军.基于新型阶跃阻抗谐振器的微带双带带通滤波器[J].固体电子学研究与进展,2013,33(6):557-560 Zhou L,Zhang X J.A novel design of microstrip dual band-pass filter based on stepped impedance resonators[J].Research & Progress of SSE,2013,33(6):557-560
[3] 陈畅,张忠祥,陈卫东.一种基于DGS结构的新型双模双通带滤波器[J].微波学报,2011,27(6):77-80 Chen C,Zhang Z X,Chen W D.A novel dual-mode dual-band bandpass filter based on DGS[J].Journal of Microwaves,2011,27(6):77-80
[4] 占腊民,陈芳胜,李文广.共面波导馈电的小型化双通带滤波器[J].微波学报,2017,33(4):52-54 Zhan L M,Chen F S,Li W G.Miniaturized dual-band bandpass filter using co-planar waveguide coupling structure[J].Journal of Microwaves,2017,33(4):52-54
[5] Duan Q ,Song K ,Chen F ,et al.Compact dual-band bandpass filter using simply hybrid structures[J].Electronics Letters,2015,51(16):1265-1266
[6] Fan Y ,Mo Y ,Tao P ,et al.Miniaturised dual-band bandpass filter using modified SIR[J].Electronics Letters,2013,49(14):888-890
[7] Song K ,Zhang F ,Fan Y .Miniaturized dual-band bandpass filter with good frequency selectivity using SIR and DGS[J].AEU - International Journal of Electronics and Communications,2014,68(5):384-387
[8] 罗杰,熊祥正,廖成.应用于WLAN的加载对称H型枝节的双通带滤波器[J].微波学报,2015,31(5):69-72 Luo J,Xiong X Z,Liao C.Design of a novel dual-band bandpass filter loaded symmetrical H-shaped stubs for WLAN application[J].Journal of Microwaves,2015,31(5):69-72
[9] 吴边,梁昌洪,苏涛.基于同步参数提取的缺陷环双通带滤波器设计[J].微波学报,2011,27(1):11-14 Wu B,Liang C H,Su T.Design of DSRR dual-band filter based on synchronous parameter extraction method[J].Journal of Microwaves,2011,27(1):11-14
[10] 张德锋,尹映辉.一种新颖微带双通带带通滤波器的设计方法[J].火控雷达技术,2009,38(4):91-94 Zhang D F,Yin Y H.A novel design method of microstrip dual bandpass filters[J].Fire Control Radar Technology,2009,38(4):91-94
[11] 刘新红.支节加载双模带通滤波器设计[J].无线电工程,2016,46(3):62-64 Liu X H.Dual-mode bandpass filter using stub-loaded resonator[J].Radio Engineering,2016,46(3):62-64
[12] Hong J S,Tang W.Dual-band filter based on non-degenerate dual-mode slow-wave open-loop resonators[A].IEEE MTT-S International Microwave Symposium[C],2009.861-864
[13] Chang K.Micro-strip filters for RF/microwave applications[M].Hoboken:John Wiley & Sons,Inc,2001
[14] Zhang X Y,Chen J X,Xue Q,et al.Dual-band bandpass filters using stub-loaded resonators[J].IEEE Microwave & Wireless Components Letters,2007,17(8):583-585
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