Reconfigurable Artificial Surfaces Based on Impedance Loaded Wires Close to a Ground Plane

This contribution investigates artificial surfaces based on arrays of impedance loaded wires in the proximity of a ground plane. It is found that for specific loads it is possible to realize high impedance surfaces and absorbing boundaries with very low profile. Furthermore, it is demonstrated that such loads correspond with realistic values which can be implemented with lumped elements and/or magnetic wires. Moreover, a wide bandwidth can be covered by using reconfigurable loads. Finally, bandwidth limitations and robustness of the system against variations in the angle of arrival are analyzed in detail.