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1.前言 在讨论矩形波导辐射场、飞行器翼边电磁散射场时,要用到二维金属尖劈的绕射系数表达式。许多学者对尖劈绕射场进行了详细讨论,给出了明确结果,其中级数形式的严格解收敛速度较慢,简化公式是当源置于无限远处取得的,对于尖劈近区场源问题没有触及,文献[2]给出的简化解析式在应用上有一定的困难。因此我们重新进行了推导,获得一种新的表达式,适合于近、远场源问题的数值计算。矩形波导棱边的绕射是普通劈尖的一个特例。因此我们把获得的普遍结果用于讨论矩形波导问题,验证了所获得公式
1. Introduction In discussing the rectangular waveguide radiation field, aircraft wing electromagnetic scattering field, the use of two-dimensional metal wedge diffraction coefficient expression. Many scholars have discussed the tip-splitting diffraction field in detail and given a clear result. Among them, the strict solution of the series form has a slower convergence rate. The simplified formula is obtained when the source is placed at infinity, The source problem is not touched. The simplified analytical formula given in [2] has some difficulties in application. Therefore, we re-derive and obtain a new expression that is suitable for the numerical calculation of near and far field sources. The diffraction of the rectangular waveguide edge is a special case of a normal wedge tip. Therefore, we use the general result obtained for discussing the rectangular waveguide problem and verify that the obtained formula