A Multi-Objective Invasive Weed Optimization for Broad Band Sequential Rotation Networks

Sequential Rotation Architecture is a wide-spread technique employed to improve bandwidth and polarization purity of Circularly Polarized Antenna Array. It consists in the rotation of antenna elements fed with a 90° progressive phase with equal signal magnitude, in order to ensure the maximum polarization purity. The core of the mechanism is the design of the Sequential Rotation Network, the feeding network imposing the sequential conditions on the antenna phases. Here a Multi-Objective variation of the Invasive Weed Optimization approach is employed to optimize the performance of this class of feeding networks.