计算瞬时多波束抛物面天线程序，计算瞬时多波束抛物面天线的辐射场，计算瞬时多波束抛物面天线口面场等。-Calculating an instantaneous multi-beam parabolic antenna program, calculate the instantaneous radiation field multi-beam parabolic antenna, calculate the instantaneous multi-beam parabolic antenna ap