Pattern-Reconfigurable Antenna With Three Switchable Beams Based on Graphene

In this article, a beam switchable pattern-reconfigurable antenna (PRA) using the adjustable impedance property of graphene is presented. The PRA consists of two dipoles and a Vivaldi antenna with the feed line on the other side of the substrate. To realize dynamical manipulation of radiation beam, three graphene pads are set on the feed line. By electrically controlling the graphene nanoplates, the beam can be switched to three directions: −90°, 0° and +90°. The results show that the PRA antenna operates at 5.8GHz with gain of 2.15dB, 5.73dB and 1.37 dB in three directions respectively. Moreover, the state at the 0° covers a wide band of 5.1-9.3GHz.