L波段大功率全带宽波导盒型窗
High power full band waveguide pill-box window
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摘要: 由于鬼模振荡的存在，普通波导盒型窗很难获得宽频带输出，其相对带宽一般只有20%～30%。提出一种新的适用于大功率螺旋线行波管非对称全带宽波导盒型窗设计思路，通过３维电磁仿真设计与优化，获得了L波段相对带宽达41.4%盒型窗结构设计参数，且频带内无鬼模振荡，考虑匹配过渡段后整个盒型窗驻波系数模拟计算小于1.1。采用此功率输出结构研制的S波段大功率行波管连续波输出功率达3 kW以上，整管实测驻波系数小于1.6。Abstract: A general waveguide pill-box window could provide maxim relative bandwidth no more than 30% because of the ghost mode effects. A new full band waveguide high power asymmetric pill-box window without ghost mode simulation and optimized approach is presented. This type pill-box window has broad band, no ghost mode and excellent voltage standing wave ratio(VSWR) characters and specially suits for high power helix TWT with kW level output. An L-band pill-box window 3-D simulation prototype connected with impedance match waveguide is obtained according to this method, which has a relative bandwidth up to 41.4% without ghost mode and the VSWR is lower than 1.1．
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Key words:
- high power microwave /
- twt /
- full waveguide band /
- pill-box window /
- simulation /
- ghost mode
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