Circular Planar Antenna with Reconfigurable Radiation Pattern using PIN Diodes

Abstract This work presents a circular planar antenna with reconfigurable radiation pattern using parasitic patches. The radiation pattern of the proposed antenna may take different radiation modes. The mode change is made using the PIN diodes connected in the gap between the central circular patch and the parasitic patches. A short circuit or an open circuit can be provided by this gap. The proposed antenna works at 5 GHz, such as 802.11a/d/n applications. The goal is to provide wider coverage by redirecting the main lobe and controlling the main beam directions to avoid interference with surrounding signals.