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Hannan 和 Gillitzer 早期提出的抛物面反射器天线的最小遮挡条件(MBC)的公式并未考虑馈源和副反射器支架遮挡的重要影响。本文所描述的用数值积分法所作的研究是为确定付反射器及其支架的合成遮挡阴影为最小的遮挡条件。MBC 有两种定义法:第一种是根据旁瓣电平定义的,它在射电天文学领域中极化测量方面是较重要的;第二种与孔径效率(方向性)有关,它在频谱学和长途通讯方面较为重要。通过两种 MBC 的比较,很明显,它们相互之间只有很细微的差别。
The formulas of the minimum occlusion conditions (MBC) proposed by Hannan and Gillitzer in the early days of a parabolic reflector antenna did not account for the significant influence of feed and shadowing of the reflector subrack. The numerical integration method described in this paper has been done to determine the minimum occlusion condition for the composite shading shadow of the reflector and its mount. The MBC has two definitions: the first is defined by the sidelobe level and is more important in polarization measurements in the field of radio astronomy; the second is related to the aperture efficiency (directivity) And long distance communication is more important. By comparison of the two MBCs, it is clear that there is only a slight difference between them.