The moment method of analysis of coupled inclined slotted array cutting in thenarrow wall of waveguide is given. The calculated and measured frequency responses of S matrix of2 models are compared

which are made up by identical 5 elements both of single slots and tightlycoupled slot pairs. The calculated and measured directional characteristics of a linear array with 68elements of single slots are also compared. The results indicate that the given methods are ratheraccurate

and it can be used to analyze the characteristics of long linear array and to be the foundation of optimization.