排序方式: 共有17条查询结果,搜索用时 406 毫秒
1.
2.
Influence of Electric Field Distribution on High-Power Array Antenna Radiation Pattern with Rectangular Aperture 下载免费PDF全文
The antenna element with rectangular aperture is one of the main forms of the array antenna. The electric field amplitude distribution of the rectangular aperture, as well as the phase distribution is the most important parameter that affects the radiation gain and beam direction of the array antenna. In this work, a theoretical study is carried out on array antennae for high-power microwave (HPM) applications. An electric integration method is applied to obtain the far-field radiation pattern with different kinds of electric field distributions. Moreover, the influence of the electric field amplitude and phase on the performance of the array antenna is analyzed. For one antenna element, uniform electric field distribution is not the best choice. However, the uniform distribution has specific advantages for an array antenna consisting of combined antenna elements. The phase deviation has more significant influence on the performance of the array antenna than the amplitude deviation. It indicates that a good working phase shifter with high-power capacity and time-adjusting capability is very important. 相似文献
3.
4.
5.
6.
7.
微波脉冲与孔阵矩形腔体耦合的数值模拟研究 总被引:1,自引:0,他引:1
利用时域有限差分(FDTD)方法对微波脉冲与孔阵矩形腔体的耦合过程进行了数值模拟研究. 当孔缝阵中的孔缝长边垂直于入射电场方向时, 详细分析了微波脉冲与孔缝阵矩形腔体的耦合过程中孔阵面上各个孔缝中心点的电场分布情况. 结果表明, 在平行于入射电场方向上排列的孔缝中, 处在中心的孔缝场增强效应最弱, 孔缝场增强效应由中心向两侧依次对称的增强; 在垂直于入射电场方向上排列的孔缝中, 处在中心的孔缝场增强效应最强, 孔缝场增强效应由中心向两边依次对称的减弱. 同时, 讨论了孔缝孔阵中孔缝个数、间隔等因素对各孔缝中心点的场增强效应和腔体内的耦合场分布的影响. 相似文献
8.
利用等离子体理论研究了电路中微波等离子体运动对电容元件的影响,给出了可能引起电路扰乱状态的参量条件.当微波等离子体较稀薄?且微波的频率或等离子体电子的渡越时间高到一定程度时,扰乱阈值与微波频率的平方成正比;如果微波的频率或等离子体电子的渡越时间低到一定程度时,其电场的特性接近直流特性,扰乱阈值与微波频率没有明显的依赖关系.从总体上看,微波频率越低,越容易扰乱集成电路的工作状态.如果等离子体频率与高功率微波频率相接近,则会产生共振效应,此时等离子体电子的振荡的幅值会大幅度提高,更容易扰乱电路的工作状态. 相似文献
9.
10.