Parameters Analysis to Pattern Null Placement Based on the Cross Entropy Method

Null Placement of array antenna can eliminate certain direction interference. A Cross-Entropy method which uses the importance sampling strategies is presented to create nulls. The population samples of the method are selected from a parameterized probability distribution and updated during the optimization procedure, so the diversity of the samples and samples set is approach to optimization results. Null placement to six elements of array antenna is simulated by the method, and some parameters of CE method are analyzed. Numerical results indicate that it is presented more effective method to array antenna optimum design. Both the premature phenomenon is overcome effectively and the computing speed is accelerated rapidly.