Wideband band-notched antenna using electromagnetic band-gap structure with dual 5G bands

Abstract

A wideband band-notched antenna using electromagnetic band-gap (EBG) structure with dual 5G bands is proposed and demonstrated. The single element antenna consists of a spade-shape radiating element, partial ground plane and two EBG structure fed by a microstrip line. The two EBG structures have an edge-located via. The wideband is realized by the combine resonance of the radiator and partial ground plane. The band notch was realized using two similar mush-rooms like EBG structures integrated into the feedline of the wideband antenna. The antenna has operating frequency of 6-12GHz with a band-notch between 8.2-10.7GHz. The EBG provide the band notch by degrading the antenna matching and changing current distribution. Moreover, the performance of the antenna has been studied and it has been found that the radiation patterns of the antenna without EBG and that with EBG are exactly the same. This indicates that the EBG has no effect on the radiation characteristics of the antenna. The simulations were done on using CST microwave studio. The fabrication of the antennas was carried out on FR4 substrate with dielectric constant Er of 4.6 and thickness 1.6mm. The measured and simulated results are compared and analysed. With two 5G bands, the antenna can be considered for future (5G) wireless mobile communication applications.