一种新型宽带SIW定向耦合器的设计与实现
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摘要
为了满足强耦合宽带应用,文中提出了一种基于缝隙耦合原理的新型基片集成波导(SIW)定向耦合器。横缝和纵缝垂直排布,缝隙单元以正"T"和倒"T"形式组成五元阵列,信号通过公共地上的缝隙阵列耦合到下层SIW的耦合端口。依据这种原理,设计了耦合度3 dB的定向耦合器,并给出了推广到5 dB和7 dB耦合器的设计参数。仿真和实测结果显示,该定向耦合器实现了较好的宽带特性。3 dB耦合器相对带宽为29.9%,输入端口驻波比在工作频段内小于1.42,隔离度小于18 dB。
In order to meet the application requirements of broadband system, a novel type of substrate integrated wave guide(SIW) directional coupler based on slot coupling theories is designed. The signal is coupled to the coupling port of SIW through a slot array on the common ground, which consists of vertically arranged transverse and longitudinal slots. The array is a five-element array in the form of positive "T" and inverted "T". Prototype of 3 dB directional couplers is designed, parameters of 5 dB and 7 dB are presented. From the simulated results, it is illustrated that the 3 dB coupler shows approximately 29.9% fractional bandwidth. The voltage standing wave ratio of the input port is less than 1.42 and the isolation is less than 18 dB in the working frequency band.
In order to meet the application requirements of broadband system, a novel type of substrate integrated wave guide(SIW) directional coupler based on slot coupling theories is designed. The signal is coupled to the coupling port of SIW through a slot array on the common ground, which consists of vertically arranged transverse and longitudinal slots. The array is a five-element array in the form of positive "T" and inverted "T". Prototype of 3 dB directional couplers is designed, parameters of 5 dB and 7 dB are presented. From the simulated results, it is illustrated that the 3 dB coupler shows approximately 29.9% fractional bandwidth. The voltage standing wave ratio of the input port is less than 1.42 and the isolation is less than 18 dB in the working frequency band.
引文
[1] YI L,HU Y,YAN H,et al.Compact monopulse sum-difference comparator based on double-layer substrate integrated waveguide [J].Electronics Letters,2017,53(22):1477-1479.
[2] CHEN P,HUA G,CHEN D T,et al.A double layer crossed over substrate integrated waveguide wideband directional coupler[C]// 2008 Asia-Pacific Microwave Conference.Macau:IEEE Press,2008:1-4.
[3] LI T,DOU W B.Substrate integrated waveguide 3 dB directional coupler based on air-filled vias[J].Electronics Letters,2017,53(9):611-613.
[4] KISHIHARA M,KOMATSUBARA M,OKUBO K.BroadBand cruciform substrate integrated waveguide couplers[C]// 2009 Asia-Pacific Microwave Conference.[S.l.]:IEEE Press,2010:2100-2103.
[5] DJERAFI T,GAUTHIER J,WU K.Quasi-optical cruciform substrate integrated waveguide (SIW) coupler for millimeter-wave systems [C]// 2010 IEEE MTT-S International Microwave Symposium.Anaheim:IEEE Press,2010:716-719.
[6] ALEXANIAN A,YORK R A.Broadband spatially combined amplifier array using tapered slot transitions in waveguide[J].IEEE Microwave and Guided Wave Letters,1997,7(2):42-44.
[7] 梁实.毫米波基片集成波导功率分配/合成器设计与实现[D].成都:电子科技大学,2012.LIANG Shi.A design of a millimeter wave power divider/combiner based on substrate integrated waveguide[D].Chengdu:University of Electronic Science and Technology of China,2012.
[8] XU F,ZHANG Y,HONG W.Finite-difference frequency domain algorithm for modeling guided-wave properties of substrate integrated waveguide[J].IEEE Transactions on Microwave Theory and Techniques,2003,51(11):2221-2227.
[9] BOZZI M,PASIAN M,PERREGRINI L,et al.Modeling of conductor,dielectric,and radiation losses in substrate integrated waveguide by the boundary integral-resonant mode expansion method[J].IEEE Transactions on Microwave Theory and Techniques,2008,56(12):3153-3161.
[2] CHEN P,HUA G,CHEN D T,et al.A double layer crossed over substrate integrated waveguide wideband directional coupler[C]// 2008 Asia-Pacific Microwave Conference.Macau:IEEE Press,2008:1-4.
[3] LI T,DOU W B.Substrate integrated waveguide 3 dB directional coupler based on air-filled vias[J].Electronics Letters,2017,53(9):611-613.
[4] KISHIHARA M,KOMATSUBARA M,OKUBO K.BroadBand cruciform substrate integrated waveguide couplers[C]// 2009 Asia-Pacific Microwave Conference.[S.l.]:IEEE Press,2010:2100-2103.
[5] DJERAFI T,GAUTHIER J,WU K.Quasi-optical cruciform substrate integrated waveguide (SIW) coupler for millimeter-wave systems [C]// 2010 IEEE MTT-S International Microwave Symposium.Anaheim:IEEE Press,2010:716-719.
[6] ALEXANIAN A,YORK R A.Broadband spatially combined amplifier array using tapered slot transitions in waveguide[J].IEEE Microwave and Guided Wave Letters,1997,7(2):42-44.
[7] 梁实.毫米波基片集成波导功率分配/合成器设计与实现[D].成都:电子科技大学,2012.LIANG Shi.A design of a millimeter wave power divider/combiner based on substrate integrated waveguide[D].Chengdu:University of Electronic Science and Technology of China,2012.
[8] XU F,ZHANG Y,HONG W.Finite-difference frequency domain algorithm for modeling guided-wave properties of substrate integrated waveguide[J].IEEE Transactions on Microwave Theory and Techniques,2003,51(11):2221-2227.
[9] BOZZI M,PASIAN M,PERREGRINI L,et al.Modeling of conductor,dielectric,and radiation losses in substrate integrated waveguide by the boundary integral-resonant mode expansion method[J].IEEE Transactions on Microwave Theory and Techniques,2008,56(12):3153-3161.