Optimizing broadside array antenna with adaptive interference cancellation using amplitude-position perturbations in a linear array

Conventional broadside antennas can form a main lobe always towards the array normal. Their structures are simple, but they are not able to suppress interference. Implementing the function of the broadside array antenna with an adaptive antenna array is a possible approach to improve performance. The paper presents such an implementation. The performance can be improved because it is possible to null the interfering signals and maximize the main lobe towards the array normal at the same time. Thus the optimal radiation pattern can be obtained. Genetic algorithms are used for the search of the optimal radiation pattern by amplitude-position perturbations. Details of the structure of the system, radiation pattern formulation, the application of the genetic algorithm and simulation results are given.