Utilization of Symmetries in Method of Moments

The utilization of symmetries on operators within method of moments is presented. Three examples are presented and commented upon - (i) the separation of the problem into a set of smaller sub-problems solved independently making significant reduction in computational time, (ii) effective modal tracking where a decision on modal crossing is made in a deterministic manner, and (iii) a design of feeding schemes to obtain orthogonal channels to be used in multiple-input and multiple-output systems.