Abstract: Based on the Moment Method (MM), a systemic theoretical and experimental study o n the reactively loaded directive circular array with a center element driven is presented. Its computation and optimization programs are established, and the r elationship between the performance and its parameters of an N element reac tively loaded circular array is given, then the design and experimental results of a seven element circular array is introduced. The measured results of input impedance, radiation patterns and gain of the array are in good agreement with t he computational values, verifying the validity of the analysis program and desi gn.