The paper presents a method for calculating the radiation patterns (RP) of dual-reflector antenna systems taking into account the electrodynamic interaction between reflectors. This method is suitable for use in the resonance range of wavelengths with respect to the main dimensions of reflectors. The method is based on the iteration procedure proposed by the authors. Each iteration involves the use of the method for calculating the scattering of electromagnetic wave by unclosed screens of finite thickness and conductivity that is suitable for use in resonance range. The specified method is based on applying the E-field integral equation that takes into account the Leontovich approximate boundary conditions on impedance surface and makes it possible to take into account the real thickness and conductivity of antenna’s reflectors. The paper presents the results of calculating RP of dual-reflector antennas built in accordance with the Gregorian scheme for different sizes of small reflector aperture and different arrangements of feeder at the fixed size of large reflector. The paths of reducing the level of the first side lobes of RP are shown. The specified reduction is achieved at the expense of the feeder proper placing with respect to the small reflector of antenna.

中文翻译：

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计算具有有限厚度和电导率的谐振尺寸反射器的双反射器天线辐射特性的方法

本文提出了一种计算双反射器天线系统辐射方向图 (RP) 的方法，该方法考虑了反射器之间的电动相互作用。该方法适用于相对于反射器主要尺寸的波长共振范围。该方法基于作者提出的迭代程序。每次迭代都涉及使用适用于共振范围的有限厚度和电导率的未闭合屏幕计算电磁波散射的方法。指定的方法基于应用电场积分方程，该方程考虑了阻抗表面上的 Leontovich 近似边界条件，并且可以考虑天线反射器的实际厚度和电导率。论文给出了在大反射面尺寸固定的情况下，针对不同尺寸的小反射面孔径和不同的馈线布置，按照格里高利方案构建的双反射面天线的RP计算结果。显示了降低RP第一旁瓣电平的路径。指定的减少是以馈线相对于天线的小反射器正确放置为代价来实现的。