Conformal Patch Antenna Made of Graphene-Based Film for 2.45GHz/5.2GHz Frequencies

Antennas in wearable electronic devices face a challenge of being flexible and conformal. In this paper, flexible patch antennas made of graphene-based film (GF) are proposed for 2.45 GHz and 5.2 GHz. Due to the flexibility of the graphene-based film, the conformal antennas are achieved by attaching them on a bended surface. The simulated and measured results show that the GF antennas can achieve a return loss of -20 dB and a satisfying gain of 5 dBi, which are comparable to copper-based counterparts. Moreover, the -3 dB bandwidth of the bended antennas are at least 25 degrees wider than the planar one.