基于非谐振节点的波导滤波器设计
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摘要
阐述了基于非谐振节点的广义耦合系数的提取、外部品质因数的理论,并结合波导滤波器的制作方法,设计了一款包含非谐振节点(NRN)元件的脊型波导滤波器.在结构上对该滤波器进行了创新,利用非谐振节点的方式,在指定频率点处产生传输零点,使带外抑制提高了40dB,回波损耗也达到指标要求.滤波器选为六阶带通波导滤波器,中心频率为5GHz、带宽为200 MHz,HFSS中的仿真结果与理想结果较吻合,证明该设计是合理、可行的.
The theories of extraction of generalized coupling coefficients including nonresonating nodes and external quality factor are introduced.On the basis,a ridge waveguide filter with nonresonating nodes is designed,employing the waveguide filter manufacturing method.This filter is a novel structure which successfully brings in the transmission zero in the certain frequency by nonresonating nodes.This kind of design makes the out of band suppression enhance remarkably,larger than 20 dB,and its return loss meet the qualification which has value in engineering.In this paper,it takes a 6-order waveguide bandpass filter as the example,whose center frequency is 5 GHz and bandwidth is 200 MHz.It is simulated in HFSS,and the simulation results obtained show very good agreement with desirable outcomes,which proves the design is reasonable and feasible.
The theories of extraction of generalized coupling coefficients including nonresonating nodes and external quality factor are introduced.On the basis,a ridge waveguide filter with nonresonating nodes is designed,employing the waveguide filter manufacturing method.This filter is a novel structure which successfully brings in the transmission zero in the certain frequency by nonresonating nodes.This kind of design makes the out of band suppression enhance remarkably,larger than 20 dB,and its return loss meet the qualification which has value in engineering.In this paper,it takes a 6-order waveguide bandpass filter as the example,whose center frequency is 5 GHz and bandwidth is 200 MHz.It is simulated in HFSS,and the simulation results obtained show very good agreement with desirable outcomes,which proves the design is reasonable and feasible.
引文
[1]ATIA A E,WILLIAMS A E.New type of waveguide bandpass filters for satellite transponders[J].Comsat Technical Reviews,1971,1(1):21-43.
[2]HEZ H,YOU C J,LENG S P,et al.Compact inline substrate integrated waveguide filter with enhanced selectivity using new non-resonating node[J].Electronics Letters,2016,52(13):1778-1780.
[3]XIAO Y,LI T,SUN H J.A novel W-band waveguide bandpass filter based on nonresonating nodes[C]//2016 9th International Conference on Microwave and Millimeter Wave Technology,ICMMT 2016-Proceedings,Beijing:IEEE,2016:833-835.
[4]MACCHIARELLA G.Generalized coupling coefficient for filters with nonresonant nodes[J].Microwave and Wireless Components Letters,2008,18(12):773-775.
[5]FAHMI M,RUIZ C J,MANSOUR R.Compact ridge waveguide filters using non-resonating nodes[J].IEEE MTT-S International Microwave Symposium Digest(IMS),2009,57(12):1337-1340.
[6]GLUBOKOV O,BUDIMIR D.Extraction of generalized coupling coefficients for inline extracted pole filters with nonresonating nodes[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(12):3023-3029.
[7]靳俊叶.新型波导滤波器研究及其应用[D].成都:电子科技大学,2014.
[8]王胜.新型太赫兹波导滤波器的研究[D].成都:电子科技大学,2014.
[2]HEZ H,YOU C J,LENG S P,et al.Compact inline substrate integrated waveguide filter with enhanced selectivity using new non-resonating node[J].Electronics Letters,2016,52(13):1778-1780.
[3]XIAO Y,LI T,SUN H J.A novel W-band waveguide bandpass filter based on nonresonating nodes[C]//2016 9th International Conference on Microwave and Millimeter Wave Technology,ICMMT 2016-Proceedings,Beijing:IEEE,2016:833-835.
[4]MACCHIARELLA G.Generalized coupling coefficient for filters with nonresonant nodes[J].Microwave and Wireless Components Letters,2008,18(12):773-775.
[5]FAHMI M,RUIZ C J,MANSOUR R.Compact ridge waveguide filters using non-resonating nodes[J].IEEE MTT-S International Microwave Symposium Digest(IMS),2009,57(12):1337-1340.
[6]GLUBOKOV O,BUDIMIR D.Extraction of generalized coupling coefficients for inline extracted pole filters with nonresonating nodes[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(12):3023-3029.
[7]靳俊叶.新型波导滤波器研究及其应用[D].成都:电子科技大学,2014.
[8]王胜.新型太赫兹波导滤波器的研究[D].成都:电子科技大学,2014.