36单元高功率双层径向线螺旋阵列天线功率容量

Power capacity of 36-element high power helical array antenna fed from double-layered radial waveguide

对36单元高功率双层径向线螺旋阵列天线的功率容量进行了研究。讨论了真空状态下的微波击穿和真空与大气交界面的微波击穿,以这两种状态下的击穿阈值为依据,论证了阵列天线实现1 GW高功率微波辐射的可行性。采用有限元软件数值模拟了中心频率为4.0 GHz的阵列天线的功率容量,给出了模拟结果并分析了功率容量降低的原因;提出了提高阵列天线功率容量的技术途径。结果表明:改进的高功率双层径向线螺旋阵列天线可以实现1 GW高功率微波的发射。

The power capacity of a 36-element high power helical array antenna fed from double-layered radial waveguide is investigated. Two breakdown conditions are discussed, which are breakdown under vacuum condition and breakdown on the medium surface. Based on those breakdown threshold values, the power capacity of the antenna is analyzed theoretically and qualitatively and simulated. The simulation results are presented and the reasons for capacity debasement are analyzed. Methods for improving the power capacity are discussed. The results show that the power capacity of the improved antenna can reach 1 GW.