Wideband antenna for ultra-wideband (UWB) body-centric wireless communications

Recently, wearable wireless communication system has attracted much attention. It is used widely in the areas of military operations, medical field and personal communication applications. With the rapid development of the wearable systems, wearable antennas are facing with a considerable design challenge, especially in the bandwidth of the antenna. This paper proposed a wearable antenna for ultra-wideband (UWB) communication systems. The antenna is composed of a quasi-trapeziform ground and a rectangular patch with two symmetrical bevel slots at each side of the lower edge of the patch. The two bevel slots on the patch can enhance the bandwidth of the antenna to satisfy the requirements of UWB communication systems. And the size of the quasi-trapeziform ground can influence the match of the antenna. The antenna shows UWB bandwidth with high performance. Then, we study the performance of the antenna worn on body. It also shows good performance. Simulation was accomplished using Ansoft HFSS and CST Microwave Studio, both simulated results are presented and they are in good agreement.