Modal Decomposition for Arbitrary Dipole Array

The Characteristic Mode Analysis (CMA) provides a set of eigenvalues and eigenvectors that are determined entirely by the antenna array structure at a particular frequency. The presented method solely relies on the mutual impedance matrix of elements of the array. In turn, the proposed approach is very fast. Various modal decompositions are performed on an array of parallel dipoles placed horizontally above an infinite electric ground plane. The dipoles have prescribed sinusoidal currents. The results are validated by a full -wave simulator FEKO, showing good agreement.