A Multilayer Waveguide Window for Wide-Bandwidth Millimeter Wave Tubes
A Multilayer Waveguide Window for Wide-Bandwidth Millimeter Wave Tubes
复制标题
DOI：
10.1007/s10762-007-9207-y
复制
发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
Ming-Chieh Lin
中科院分区：
文献类型：
--
作者：
Ming-Chieh Lin
在高频微波管中，多层波导窗口具有宽带宽和高传输性能。采用传递矩阵法对矩形波导中多层异质结构的介电函数分布进行离散化。得到了封闭形式，并进行了相应的反射和透射特性分析。并通过有限元程序HFSS将解析计算结果与数值模拟结果进行了比较。精确计算与数值模拟结果吻合较好。通过比较，该方法不仅提高了精度和效率，而且为设计提供了良好的依据。结果表明，在中心频率为35 GHz或25%时，可将s11 -20 dB以下99%的传输带宽优化为8.75 GHz左右。宽频带波导窗口可以很容易地设计用于ka波段和w波段管，甚至用于更高频率的管。
A multilayer waveguide window is demonstrated to exhibit wide bandwidth and high transmission for applications in high-frequency microwave tubes. A transfer matrix approach is employed to discretize the dielectric function profile of the multilayer heterostructure in a rectangular waveguide. The closed form has been obtained and the corresponding reflection and transmission characteristics have been carried out. The analytical calculation is also compared with the result of numerical simulation via the finite-element code HFSS. The exact calculation agrees with the numerical simulation very well. By comparison, the approach not only enhances the accuracy and efficiency, but also gives a good criterion for the design. The results show that the bandwidth for a transmission of 99%, i.e.,S11below –20 dB, can be optimized to be about 8.75 GHz at a central frequency of 35 GHz or about 25%. A wide-bandwidth waveguide window can be easily designed for Ka-band and W-band tubes, and even for higher frequency ones.