Mode matching method is used to analyze the scattering characteristics of thecircular-to-circular groove waveguide junction. Matching the electric fields and magnetic fields atthe boundary of the junction, and multipl...Mode matching method is used to analyze the scattering characteristics of thecircular-to-circular groove waveguide junction. Matching the electric fields and magnetic fields atthe boundary of the junction, and multiplying the mode functions of the circular waveguide andcircular groove waveguide on both sides of the boundary equation, the scattering matrix equation isobtained, the scattering coefficients can be obtained from the equation. Then the scatteringcharacteristics of the iris with circular window in circular groove waveguide are analyzed. At lastthe convergent problem is discussed; when choosing a suitable mode group, convergent numericalresults are obtained, and the frequency response of the iris' scattering coefficients is also given.展开更多
The coupling properties of a transverse slot in the common wall between two buttingrectangular waveguides are discussed.By means of Galerkin’s method which takes into accountthe wall thickness,equivalent magnetic cur...The coupling properties of a transverse slot in the common wall between two buttingrectangular waveguides are discussed.By means of Galerkin’s method which takes into accountthe wall thickness,equivalent magnetic currents on the aperture surface of the slot are obtained,and then the general formulae of scattering fields and of equivalent parameters are derived.Thedimensions as well as seats of those two waveguides and the slot,and the thickness of the wall arearbitrary.For example,the transforming coefficients and the VSWRs of numerical calculationand experimental results are given.They are in good agreement.展开更多
提出一种宽频带、小型化单脊波导功分器结构。分支波导采用标准单脊波导,在维持较高功率容量的条件下拓展了传输模的主模带宽。在T型结处设置一容性金属平板与分支单脊波导相接构成一个宽带电抗性调谐元件,在主模带宽拓展的情况下有效...提出一种宽频带、小型化单脊波导功分器结构。分支波导采用标准单脊波导,在维持较高功率容量的条件下拓展了传输模的主模带宽。在T型结处设置一容性金属平板与分支单脊波导相接构成一个宽带电抗性调谐元件,在主模带宽拓展的情况下有效地实现了T型结的宽带匹配。为了能够与标准器件连接,设计了单脊波导-标准矩形波导转换器件,采用多级阶梯匹配的形式使转换器件的阻抗带宽与T型结保持一致。利用高频仿真软件HFSS进行仿真优化,结果显示该功分器在25~40 GHz频率范围内,回波损耗小于–20 d B,信号波动优于0.04 d B,相对带宽为46.2%,实际内部尺寸比标准波导功分器减少38%。该单脊波导功分器具有低损耗、小型化和宽频带的优点,可以广泛应用于雷达、天线以及功率放大器等微波设备。展开更多
文摘Mode matching method is used to analyze the scattering characteristics of thecircular-to-circular groove waveguide junction. Matching the electric fields and magnetic fields atthe boundary of the junction, and multiplying the mode functions of the circular waveguide andcircular groove waveguide on both sides of the boundary equation, the scattering matrix equation isobtained, the scattering coefficients can be obtained from the equation. Then the scatteringcharacteristics of the iris with circular window in circular groove waveguide are analyzed. At lastthe convergent problem is discussed; when choosing a suitable mode group, convergent numericalresults are obtained, and the frequency response of the iris' scattering coefficients is also given.
文摘The coupling properties of a transverse slot in the common wall between two buttingrectangular waveguides are discussed.By means of Galerkin’s method which takes into accountthe wall thickness,equivalent magnetic currents on the aperture surface of the slot are obtained,and then the general formulae of scattering fields and of equivalent parameters are derived.Thedimensions as well as seats of those two waveguides and the slot,and the thickness of the wall arearbitrary.For example,the transforming coefficients and the VSWRs of numerical calculationand experimental results are given.They are in good agreement.
文摘提出一种宽频带、小型化单脊波导功分器结构。分支波导采用标准单脊波导,在维持较高功率容量的条件下拓展了传输模的主模带宽。在T型结处设置一容性金属平板与分支单脊波导相接构成一个宽带电抗性调谐元件,在主模带宽拓展的情况下有效地实现了T型结的宽带匹配。为了能够与标准器件连接,设计了单脊波导-标准矩形波导转换器件,采用多级阶梯匹配的形式使转换器件的阻抗带宽与T型结保持一致。利用高频仿真软件HFSS进行仿真优化,结果显示该功分器在25~40 GHz频率范围内,回波损耗小于–20 d B,信号波动优于0.04 d B,相对带宽为46.2%,实际内部尺寸比标准波导功分器减少38%。该单脊波导功分器具有低损耗、小型化和宽频带的优点,可以广泛应用于雷达、天线以及功率放大器等微波设备。
