Feasibility Analysis for Active Manipulation of Electromagnetic Fields in Free Space

In this work, a feasibility analysis of the active manipulation for electromagnetic (EM) fields is presented. The strategy of the EM fields control is to construct surface current sources that are able to control the EM fields in some near and far regions. We discuss the feasibility of the active scheme (with respect to power budget, control accuracy, and quality factor Q) as a function of the frequency and the distance between the control region and the source. The numerical simulations discuss the performance of the active field control scheme and illustrate some challenges and limitations.