S波段高功率径向线输出窗的设计

Design of S-band high-power radial line microwave output window

为进一步改进和优化高功率径向线阵列天线的拓扑结构,提高功率容量水平,并满足馈源的真空密封需求,提出并设计了一种适用于高功率径向线阵列天线的微波输出窗。该高功率径向线输出窗采用圆环形陶瓷,材料介电常数为9.4,窗片厚度为3 mm,内径为36 mm,可实现径向线阵列天线馈电系统的输入同轴波导与输出同轴波导间的真空密封。设计结果表明:在中心频率为2.856 GHz下,该径向线输出窗驻波比为1.03,插入损耗为0.17 dB,设计功率容量约150 MW。

In order to further improve and optimize the topological structure of the high-power radial line array antenna,in crease the power capacity,and satisfy the demand of the vacuum sealing of feed source,a microwave output window suitable for high-power radial line array antenna was designed.The material of the high-power radial line output window is circular ceramic,whose permittivity is 9.4,the thickness of the window is 3 mm,and inner radius of the window is 36 mm.It can realize vacuum sealing of the radial line array antenna feed system between the input coaxial waveguide and the output coaxial waveguide.Under the center frequency of 2.856 GHz,this radial line output window＇s standing wave ratio is 1.03,insertion loss is 0.17 dB and power capacity attain about 150 MW.