Their interest in ? a - stap stemmed from the fact that antenna engineers have excelled in the design of high performance sum and difference beam whether for phased array or for reflector antenna 人们对这种特殊的空时二维处理感兴趣的原因是无论相控阵天线系统还是反射面天线系统，天线工程师都可以设计出性能很好的和、差波束。
