Radiation Pattern Shaping of Partially Reactively Loaded Antenna Array Using Iterative Approach

An iterative approach for the shaping of the whole radiation pattern at a single frequency using a partially reactively loaded antenna array is presented. The approach is applicable to a generic array with a fixed arrangement and takes into account the interaction between ports of the array. The array is characterized by an impedance matrix and a set of radiation patterns which are calculated just once by a full-wave simulation. The excitation of the excited ports and the loads of the reactively loaded ports are determined to approximate a given radiation pattern by an array radiation pattern. The approach is validated through several examples of a circular array of quarter-wavelength monopoles.