Wideband antenna and wideband bandpass filter for wearable systems

With the rapid development in wearable systems in recent years, the need for wireless communication components integrated into clothing is increasing. Wearable antennas and radio frequency (RF) devices are faced with a considerable design challenge, especially in the gains of antennas and performances of filters. This paper presents a wearable antenna and a wearable bandpass filter for ultra-wideband (UWB) communication systems. The antenna is composed of a cone-shaped patch, a coplanar waveguide (CPW) ground, and several uniform semi-ring slots. The slots can improve the gain of the antenna and had no significant effect on the bandwidth. The filter is constituted of a modified stepped impedance resonator (SIR), two identical feed-lines, and a CPW ground. Simulation was accomplished using Ansoft HFSS and CST Microwave Studio, both simulated results are presented and they are in good agreement.