Abstract: The novel definition of the eigen-driven mode is given in antenna array analysis by the Moment Method. The practical array with mutual coupling between elements is approximated with the ideal one without mutual coupling. The excitation coefficients derived from the current distribution of ideal array elements are used to excite the array with mutual coupling, to produce the same radiation pattern as that of the ideal array. The process of pattern synthesis of a practical array is shortened because of the reduced electromagnetic analysis. Some examples are illustrated to prove the conclusion.

Key words: MoM, the eigen-driven, array with mutual coupling, ideal array, pattern synthesis