【作者】 杨凡；

【导师】 褚庆昕； 李惊生；

【作者基本信息】 华南理工大学 ， 集成电路工程（专业学位）， 2021， 硕士

【摘要】 21世纪,军事科学技术得到了极大的发展。从当前的军事技术革命发展态势看,在未来战争中,电子战将成为信息战的重要组成部分。微波毫米波技术在电子战中扮演着至关重要的角色,因而受到了众多学者的广泛研究。但是,目前单个固态器件的输出功率随着频率的升高而降低,到了毫米波频段已经难以满足应用的需求。因此,为了获得大功率毫米波信号,旨在把各路功率信号进行合成的径向功率分配/合成器成为了研究的热点。本论文主要以高隔离径向功率分配/合成器为研究重点,其主要工作如下:1、设计了一款紧凑高隔离Ka频段五端口径向功率分配/合成器。该结构通过两个相连的探针和两个同轴阻抗变换段实现结构的宽带匹配,通过梯形圆台实现输出端口的良好隔离特性和匹配特性。当同轴端口输入TEM(Transmission Electron Microscopy)模信号时,圆波导端口无输出信号,三个矩形波导端口的输出信号等幅同相。本章详细阐述了其工作原理,并用仿真软件进行仿真,然后进行了加工和测试。最后对测试结果进行了分析,测试结果表明该结构在毫米波频段取得较好的效果,具有很强的实用价值,实现了最初的设计目标。当圆波导端口接匹配负载时,在29-33GHz频带内,三个矩形波导端口的反射系数大于14dB,三个矩形波导端口之间的隔离度大于20dB。同轴端口的反射系数在30-32GHz频段内大于15dB,在29.5-32.5GHz大于13dB。2、设计了一款基于魔T结构的高隔离径向九路功率分配/合成器。该径向九路结构通过脊波导探针、两段相连的探针和两个同轴阻抗变换段实现整体结构的宽带匹配,通过梯形圆台和梯形切角实现端口的隔离与匹配。该径向九路结构是第二章五端口结构的三个矩形波导端口与三个相同的基于脊波导探针耦合的共面波导魔T的和端口相连组成的。因此当同轴端口输入TEM模信号时,径向九路结构的六个矩形波导输出端口的输出信号等幅同相。本章从理论分析、设计分析、仿真分析到实验验证等方面对径向九路结构进行了详细分析论述,测试结果表明该结构在毫米波频段具有良好的效果,达到了最初的设计目标。当圆波导端口接匹配负载时,在29-32GHz频带内,矩形波导端口 1到矩形波导端口 6的反射系数大于17dB,矩形波导端口 7到矩形波导端口9的反射系数大于19dB,同轴端口的反射系数大于15dB,同一魔T输出端口之间的隔离度大于17dB,不同一魔T输出端口之间的隔离度大于24dB。3、设计了一款基于魔T结构的反相径向六路功率分配器。该反相径向六路功率分配器是第二章五端口结构的三个矩形波导端口与三个相同的基于脊波导探针耦合的共面波导魔T的差端口相连组成的。当同轴端口输入TEM信号时,该结构产生两个径向三路功率分配器。这两个径向三路功率分配器之间的输出信号等幅反相,但在径向三路功率分配器内部输出端口的输出信号等幅同相。本章给出了基于魔T结构的反相径向六路功率分配器的工作原理,并对其进行了仿真分析,仿真分析结果表明该结构在毫米波频段具有良好的宽带特性和隔离特性。更多还原

【Abstract】 In the 21st century,military science and technology have been greatly developed.Judging from the current development trend of military technology revolution,in future wars,electronic warfare will become an important part of information warfare.Microwave and millimeter wave technology plays a vital role in electronic warfare and has been extensively studied by many scholars.However,at present,the output power of a single solid-state device decreases as the frequency increases,and it is difficult to meet application requirements in the millimeter wave frequency band.Therefore,in order to obtain high-power millimeter-wave signals,a radial power splitter/combiner,which aims to combine various power signals,has become a research hotspot.This dissertation focuses on high isolation radial power splitter/combiner,and its main work is as follows:1.Designed a compact and high isolation Ka-band five-port radial power distributor/combiner.The structure achieves broadband matching of the structure through two connected probes and two coaxial impedance transformation sections,and achieves good isolation characteristics and matching characteristics of the output port through a trapezoidal round table.When the TEM mode signal is input to the coaxial port,the circular waveguide port has no output signal,and the output signals of the three rectangular waveguide ports are equal in amplitude and in phase.This chapter expounds its working principle in detail,and simulates with simulation software,and then performs processing and testing.Finally,the test results are analyzed,and the test results show that the structure has achieved good results in the millimeter wave frequency band,has strong practical value,and achieved the initial design goals.When the circular waveguide port is connected to a matched load,in the 29-33GHz frequency band,the reflection coefficient of the three rectangular waveguide ports is greater than 14dB,and the isolation between the three rectangular waveguide ports is greater than 20dB.The reflection coefficient of the coaxial port is greater than 15dB in the 30-32GHz frequency band,and greater than 13dB in the 29.5-32.5GHz frequency band.2.Designed a high isolation radial nine-way power splitter/combiner based on the magic T structure.The radial nine-way structure realizes broadband matching of the overall structure through a ridge waveguide probe,two connected probes and two coaxial impedance transformation sections,and achieves port isolation and matching through trapezoidal truncated cones and trapezoidal cut corners.The radial nine-way structure is composed of three rectangular waveguide ports of the five-port structure in Chapter 2 connected with three identical coplanar waveguide magic T ports based on ridge waveguide probe coupling.Therefore,when a TEM mode signal is input to the coaxial port,the output signals of the six rectangular waveguide output ports of the radial nine-way structure are equal in amplitude and in phase.This chapter analyzes and discusses the radial nine-way structure in detail from theoretical analysis,design analysis,simulation analysis to experimental verification.The test results show that the structure has a good effect in the millimeter wave frequency band and has reached the initial design goal.When the circular waveguide port is connected to a matched load,in the 29-32GHz frequency band,the reflection coefficient from rectangular waveguide port 1 to rectangular waveguide port 6 is greater than 17dB,and the reflection coefficient from rectangular waveguide port 7 to rectangular waveguide port 9 is greater than 19dB.The reflection coefficient is greater than 15dB,the isolation between the same magic T output port is greater than 17dB,and the isolation between different magic T output ports is greater than 24dB.3.Designed an inverted radial six-way power divider based on the magic T structure.The inverted radial six-way power divider is composed of three rectangular waveguide ports of the five-port structure in Chapter 2 connected with three identical difference ports of the coplanar waveguide magic T based on the coupling of ridge waveguide probes.When a TEM signal is input to the coaxial port,this structure produces two radial three-way power splitters.The output signals between the two radial three-way power dividers are equal in amplitude and opposite phase,but the output signals at the internal output ports of the radial three-way power divider are equal in amplitude and in phase.This chapter presents the working principle of the inverted radial six-way power divider based on the magic T structure,and conducts simulation analysis on it.The simulation analysis results show that the structure has good broadband characteristics and isolation characteristics in the millimeter wave frequency band.更多还原