摘要
对不同尺寸圆波导TE11模,以及TE11和TM01不同比例混合模式的辐射情况进行了模拟研究,得到了E面、H面功率方向图,通过高功率微波远场测量常采用的假设方向图对称的方法,计算出E面、H面方向性系数,并与模拟得到的方向性系数进行对比。结果表明:TE11单模及TE11模与功率占5%,10%的TM01模混合情况下,H面方向性系数与模拟得到的方向性系数最大差值小于0.8 dB,E面方向性系数与模拟值最小差值大于1 dB。因此,在这些情况下,H面方向性系数更接近于方向性系数,采用H面方向性系数计算功率结果更接近实际值。
This paper presents the simulation of the radiation from both the pure mode of TE11 and the mixed modes of TE11 and TM01 with different power proportion for circular wave-guides of different diameters. The directivities of E plane and of H plane are calculated, with the hypothesis of axially symmetric radiation patterns, which is usually used in the power measurement of HPM in far-field zones. The calculated directivities are compared with the simulated ones of the real radiation patterns. The results show that in the case of the pure mode and of the mixed modes with TM01 power proportion of 5% and 10%, the maximum difference between the calculated directivities and the simulated ones is less than 0. 8 dB at H plane, while the minimum difference between the two kinds of directivities is larger than 1 dB at E plane. The employment of the directivity at H plane can improve the accuracy of the power measurement of HPM.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2006年第3期431-434,共4页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
