引言六十年代初,在线性天线阵获得多波束的技术中采用了Butler矩阵。通常,2N端口的Butler矩阵可以向一个Ⅳ单元的天线阵馈电,其中N=2~p,p为整数。但是谢尔通(Shelton)和Kelleher指出:一个对称的六端口接头可用来作为一标准部件,以产生具有向N=2~p3~q元天线馈电的网络。Shelton叙述了这种包括定向耦合器的N=3的六端口网络。但是 INTRODUCTION In the early 1960s, Butler matrices were used in the technique of obtaining multiple beams for linear antenna arrays. Typically, 2N port Butler matrix can be fed to an IV array antenna array, where N = 2 ~ p, p is an integer. But Shelton and Kelleher point out that a symmetrical six-port connector can be used as a standard component to create a network with antennas fed to N = 2 ~ p3 ~ q antennas. Shelton describes this six-port network with N = 3 directional couplers. but