基于枝节加载谐振器的三通带滤波器的设计
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摘要
本文提出了一种基于枝节加载谐振器的三通带滤波器的设计方案。由奇偶模理论对六模谐振器进行分析可知,该谐振器的截止频点与开路枝节的电长度和特性导纳相关。该滤波器采用LTCC工艺和加载接地电容结构降低器件的尺寸,利用枝节对称结构降低设计复杂程度。经过原理计算及三维电磁场仿真优化,最终设计的带通滤波器尺寸为4.8 mm×4.2 mm×1.5 mm。最后经过加工测试对比,通带内回波损耗均优于10 dB,带外抑制均超过15 d B,该设计方案能够满足实际需求,可以用于对于多频段通信有需求的射频前端。
This paper presents a design scheme of three-pass band filter based on the branch loaded resonator. The cutoff frequency of the resonator is related to the electrical length and characteristic admittance of the open branch. LTCC process and grounding capacitance structure are used to reduce the size of the filter,and the branch symmetry structure is used to reduce the complexity of the design. After theoretical calculation and 3 d electromagnetic field simulation optimization,the size of the band-pass filter is4.8 mm × 4.2 mm × 1.5 mm. With processing test and comparison,the in-band echo loss is less than 10 dB,and the out-of-band suppression is more than 15 dB. Therefore,it can conclude that this design scheme can meet the actual requirements and can be used for the RF front-end with requirements for multi-band communication.
This paper presents a design scheme of three-pass band filter based on the branch loaded resonator. The cutoff frequency of the resonator is related to the electrical length and characteristic admittance of the open branch. LTCC process and grounding capacitance structure are used to reduce the size of the filter,and the branch symmetry structure is used to reduce the complexity of the design. After theoretical calculation and 3 d electromagnetic field simulation optimization,the size of the band-pass filter is4.8 mm × 4.2 mm × 1.5 mm. With processing test and comparison,the in-band echo loss is less than 10 dB,and the out-of-band suppression is more than 15 dB. Therefore,it can conclude that this design scheme can meet the actual requirements and can be used for the RF front-end with requirements for multi-band communication.
引文
[1]王言.基于多模谐振器的小型化多通带滤波器设计[D].华东交通大学,2014:47-49.
[2]杜立航,屈德新,缪古.基于三节阶跃阻抗谐振器的紧凑型三通带滤波器[J].军事通信技术,2011,32(03):50-52+70.
[3]WU H W,YANG R Y. A New Quad-Band Bandpass Filter Using Asymmetric Stepped Impedance Resonators[J].IEEE Microwave and Wireless Components Letters,2011,21(4):203-205.
[4]雷梦丹.微带多模谐振器的研究及其在滤波器设计中的应用[D].西安电子科技大学,2015:57-66.
[5]LIU Y,DOU W B. A Dual-Band Filter Realized by Alternately Connecting the Main Transmission-Line With Shunt Stubs and Shunt Serial Resonators[J]. IEEE Microwave and Wireless Components Letters,2009,19(5):296-298.
[6]蔡伟伟,梁飞,吕文中等.基于双模谐振器的双通带可调谐滤波器设计[J].微波学报,2018(1):66-69.
[7]POZAR D M.微波工程[M].张肇仪,周乐柱,吴德明等译.(第三版),北京:电子工业出版社,2006:199-201.
[8]张友俊,张颖.新型通带可控低损耗小型四频带通滤波器设计[J].微波学报,2017,33(06):35-38.
[9]张赟霞,林磊.基于多模谐振器的双通带滤波器[J].现代雷达,2018,40(08):68-71.
[10]王菲,陈海华,胡方靖等.基于多模谐振器的三通带滤波器的设计[J].电子元件与材料,2017,36(05):72-76+99.
[2]杜立航,屈德新,缪古.基于三节阶跃阻抗谐振器的紧凑型三通带滤波器[J].军事通信技术,2011,32(03):50-52+70.
[3]WU H W,YANG R Y. A New Quad-Band Bandpass Filter Using Asymmetric Stepped Impedance Resonators[J].IEEE Microwave and Wireless Components Letters,2011,21(4):203-205.
[4]雷梦丹.微带多模谐振器的研究及其在滤波器设计中的应用[D].西安电子科技大学,2015:57-66.
[5]LIU Y,DOU W B. A Dual-Band Filter Realized by Alternately Connecting the Main Transmission-Line With Shunt Stubs and Shunt Serial Resonators[J]. IEEE Microwave and Wireless Components Letters,2009,19(5):296-298.
[6]蔡伟伟,梁飞,吕文中等.基于双模谐振器的双通带可调谐滤波器设计[J].微波学报,2018(1):66-69.
[7]POZAR D M.微波工程[M].张肇仪,周乐柱,吴德明等译.(第三版),北京:电子工业出版社,2006:199-201.
[8]张友俊,张颖.新型通带可控低损耗小型四频带通滤波器设计[J].微波学报,2017,33(06):35-38.
[9]张赟霞,林磊.基于多模谐振器的双通带滤波器[J].现代雷达,2018,40(08):68-71.
[10]王菲,陈海华,胡方靖等.基于多模谐振器的三通带滤波器的设计[J].电子元件与材料,2017,36(05):72-76+99.