A Dual-band Flexible Printed Graphene Antenna Array for 2.4 and 5 GHz WLAN IoE Applications

In this paper, a 70 x 210 mm dual-band screen-printed graphene flexible antenna array designed for 2.4 GHz and 5 GHz Internet of Everything (IoE) wireless local area network (WLAN) communication signal use is presented. The flexibility of the antenna is achieved using Co-Planar Waveguide (CPW) feed and screen-printing highly conductive graphene ink on extremely low-cost and disposable paper substrate. The proposed antenna consists of two elements and a stepped ground integrated with side stubs, supporting 2.4 GHz (802.11b/g/n) and 5 GHz (802.11a/n/ac) WIFI and WLAN communication networks, with bandwidths of 1.74-2.72 GHz (55.96%) and 3.44-6.26 GHz (81.98%), achieving peak gains of 2.37 dBi and 2.55 dBi at 2.05 and 5.06 GHz, showing outstanding power transmissions and radiation performance at both frequencies, guaranteeing strong and stable wireless connections.