紧凑型宽谱高功率微波辐射器仿真设计

为了提高宽谱高功率微波辐射源的辐射因子，提出采用双路同步输出的宽谱谐振器驱动22宽带高功率贴片天线阵的技术思路。设计了一种双路同步输出的宽谱高功率脉冲谐振器，由两个同轴谐振腔尾尾相连，并共用一个环形对地开关，实现两路宽谱脉冲的同步产生与输出，通过对T形充电结构进行优化，使输出宽谱脉冲幅值达到充电电压的0.89倍。22宽带高功率单层贴片天线阵采用气体基底和单层贴片结构以降低重量，单层贴片设计为E形以拓展工作带宽，通过对天线阵几何参数进行全局优化，优化后的天线阵百分比带宽为47%(驻波比VSWR小于2)，中心频率300 MHz的增益为11.8 dB。对天线阵工作过程中的电场强度分析表明，在天线罩内填充105 Pa的SF6气体时，理论功率容量可达到7.4 GW。对整个辐射系统的电性能进行了仿真分析，系统的理论辐射因子可达谐振器充电电压的2.8倍。

Simulation design of an compact mesoband high power microwave radiator

A high power wideband patch antenna array driven by two switched oscillators with synchronism output was designed, so as to increase the radiation factor of the mesoband high power microwave radiator. A single layer patch and an air substrate were employed to reduce the weight of the array, each patch is E-shaped for broadening the bandwidth. Optimization of the arrays geometric parameters was performed to get the highest radiation factor. As a result, the radiation factor is 3.4 times of the magnitude of the feed in mesoband pulse, the percentage of bandwidth is 47%, and the gain of the array is 11.8 dB at frequency of 300 MHz. Filling SF6 gas with a pressure of 1 atm in the nylon-case, the power capability of the array is as high as 7.45 GW. A novel mesoband pulse generator with the two-port synchronous output was provided. The generator has a dual-path sync output wideband resonator structure, in which two resonators share a shorting switch to achieve synchronous output. The design of the generator is optimized, and the coupler has a couple ratio of 0.644 at the frequency of 300 MHz. The simulation comparison between the generators with and without T-shaped charging structure was performed, which shows that the output pulse amplitude of the generator with the charging structure is only 4%, lower than that without the charging structure.