矩形波导宽边复合辐射单缝的分析

基于分析和设计复合缝阵列天线的需要，采用全域正弦基Ｇａｌｅｒｋｉｎ法，对矩形波导宽边复合辐射单缝的谐振特性和散射特性进行了分析。通过引入等效平行四边形概念和格林函数的谱域表达式，大大简化了问题的复杂程度，显著提高了运算速度（在Ｐｅｎｔｉｕｍ－９０ＭＨｚ微机上分析一个复合单缝，截取５个缝隙口面电场模式，仅需约５ｓ）。计算结果表明，随着缝的倾角和横向偏置的增大，在谐振时其口面基模电场幅度和相位的变化趋于平缓；而在横向偏置相同的条件下，倾角越大，基模电场的相位随频率的变化越平缓，幅度则正好相反。与已发表的文献相比较，所得数值结果更接近于实验数据。

Analysis of compound radiating slot in broadwalls of rectangular waveguide

Based on the need for the analysis and design of compound slot array, theoretical analysis of the resonance and scattering characteristics of a compound radiating slot in a broadwall of a rectangular waveguide employing Galerkin method with global sinusoidal basis is presented. By introducing the concept of equivalent parallelogram and spectral domain expression of free space Green function, complexity of the problem is greatly reduced and computation speed is significantly increased (under the condition of truncating five aperture field modes, only 5s is needed for analyzing a compound slot with a Pentium 90MHz computer). Numerical results reveal that variations of the amplitude and phase of dominant aperture field mode at resonance tend to be smoother with the increase of tilt and offset of the slot. For a fixed offset, frequency response of the phase of dominant aperture field mode tends to be smoother with the increase of tilt whereas converse conclusion can be drawn for that of the amplitude. Compared with literature published, our numerical results are much closer to the experimental data.