A new lumped element model for conventional Marchand baluns is presented. Analyzed by the even- and odd-mode method, the equivalent equations are derived for ）./4 coupled lines. Based on the proposed 5th-order lumped...A new lumped element model for conventional Marchand baluns is presented. Analyzed by the even- and odd-mode method, the equivalent equations are derived for ）./4 coupled lines. Based on the proposed 5th-order lumped equivalent circuit for ）./4 coupled lines, the self-inductance, mutual inductive coupling and the capacitance can be calculated according to the even- and odd-mode characteristic impedance, therefore, the model parameters of the balun can be easily gained from the derived equations. To verify the model, a GaAs monolithic wideband Marchand balun was implemented and tested. The EM simulation and experimental results show a good agreement with the model simulation. This model is available in a wide frequency range and makes the design procedure of the Marchand balun faster and easier.展开更多
巴伦作为差分到单端信号转换的关键组件,在高速电路实现中得到了广泛研究与应用。但目前对于毫米波频段的巴伦研究甚少,特别是基于PCB加工工艺的高频巴伦。针对该应用,提出了一款适用于毫米波频段的平面Marchand巴伦。所设计的微带巴伦...巴伦作为差分到单端信号转换的关键组件,在高速电路实现中得到了广泛研究与应用。但目前对于毫米波频段的巴伦研究甚少,特别是基于PCB加工工艺的高频巴伦。针对该应用,提出了一款适用于毫米波频段的平面Marchand巴伦。所设计的微带巴伦的最小线宽和缝隙宽度均大于0.12 mm,满足PCB加工工艺要求。仿真结果表明,该巴伦工作带宽为21.9%,差分端的最大幅度和相位失配分别小于1.1 d B和6°。为进行试验验证,在RO4350基板上集成了巴伦以及用于测试的耦合微带线—矩形波导转换结构。测试与仿真结果基本一致,证明了所提出的巴伦具有良好的性能。展开更多
为了实现三耦合线Marchand巴伦的快速设计,缩小巴伦的尺寸,提出了一种简化的三耦合线Marchand巴伦等效模型及小型化设计方法。该等效模型将复杂的三耦合线的S参数散射矩阵的计算问题简化为对两个并联的平行耦合线的S参数散射矩阵的计算...为了实现三耦合线Marchand巴伦的快速设计,缩小巴伦的尺寸,提出了一种简化的三耦合线Marchand巴伦等效模型及小型化设计方法。该等效模型将复杂的三耦合线的S参数散射矩阵的计算问题简化为对两个并联的平行耦合线的S参数散射矩阵的计算。为了验证该模型和设计方法的有效性,采用0. 1μm砷化镓pHEMT (pseudomorphic High Electron Mobility Transistor)工艺制作了一款75~110 GHz的单平衡混频芯片,最终应用于单平衡混频器的巴伦耦合线长度被缩减为中心频率1/4波长的44%。良好的混频器性能和紧凑的芯片面积证明了所提三耦合线巴伦的等效模型和设计方法能够为单片集成微波电路芯片的设计提供指导作用。展开更多
文章介绍了用于实现LTCC(Low Temperature Co-fired Ceramic,低温共烧陶瓷)双平衡星型混频器的宽带巴伦设计。该巴伦是基于LTCC技术设计的多层结构巴伦,由2个相同的Marchand巴伦组成,采用宽边耦合线结构,提高了耦合系数,从而增加了巴伦...文章介绍了用于实现LTCC(Low Temperature Co-fired Ceramic,低温共烧陶瓷)双平衡星型混频器的宽带巴伦设计。该巴伦是基于LTCC技术设计的多层结构巴伦,由2个相同的Marchand巴伦组成,采用宽边耦合线结构,提高了耦合系数,从而增加了巴伦的带宽。设计的巴伦在5.575～6.775 GHz的频率范围内,其幅度不平衡度小于0.1 dB,带内相位差为180±6°,可应用于C频段LTCC双平衡星型混频器。展开更多
基金Supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(The Project-sponsored by SRF for ROCS,SEM)National Natural Science Foundation of China(61273142)+1 种基金China Postdoctoral Science Foundation(2015M570414)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
基金supported by the Start-Up Fund for Senior Professional Research in Jiangsu University,China(No.11JDG057)the Natural Science Fund for Colleges and Universities in Jiangsu Province,China(No.10KJB510002)
文摘A new lumped element model for conventional Marchand baluns is presented. Analyzed by the even- and odd-mode method, the equivalent equations are derived for ）./4 coupled lines. Based on the proposed 5th-order lumped equivalent circuit for ）./4 coupled lines, the self-inductance, mutual inductive coupling and the capacitance can be calculated according to the even- and odd-mode characteristic impedance, therefore, the model parameters of the balun can be easily gained from the derived equations. To verify the model, a GaAs monolithic wideband Marchand balun was implemented and tested. The EM simulation and experimental results show a good agreement with the model simulation. This model is available in a wide frequency range and makes the design procedure of the Marchand balun faster and easier.
文摘巴伦作为差分到单端信号转换的关键组件,在高速电路实现中得到了广泛研究与应用。但目前对于毫米波频段的巴伦研究甚少,特别是基于PCB加工工艺的高频巴伦。针对该应用,提出了一款适用于毫米波频段的平面Marchand巴伦。所设计的微带巴伦的最小线宽和缝隙宽度均大于0.12 mm,满足PCB加工工艺要求。仿真结果表明,该巴伦工作带宽为21.9%,差分端的最大幅度和相位失配分别小于1.1 d B和6°。为进行试验验证,在RO4350基板上集成了巴伦以及用于测试的耦合微带线—矩形波导转换结构。测试与仿真结果基本一致,证明了所提出的巴伦具有良好的性能。
文摘为了实现三耦合线Marchand巴伦的快速设计,缩小巴伦的尺寸,提出了一种简化的三耦合线Marchand巴伦等效模型及小型化设计方法。该等效模型将复杂的三耦合线的S参数散射矩阵的计算问题简化为对两个并联的平行耦合线的S参数散射矩阵的计算。为了验证该模型和设计方法的有效性,采用0. 1μm砷化镓pHEMT (pseudomorphic High Electron Mobility Transistor)工艺制作了一款75~110 GHz的单平衡混频芯片,最终应用于单平衡混频器的巴伦耦合线长度被缩减为中心频率1/4波长的44%。良好的混频器性能和紧凑的芯片面积证明了所提三耦合线巴伦的等效模型和设计方法能够为单片集成微波电路芯片的设计提供指导作用。
