Design of a compact UWB diversity antenna for WBAN wrist-watch applications

This paper presents a compact ultra-wideband diversity antenna for wireless body area network wrist-watch applications. The antenna is designed based on a folded monopole antenna with a stub in order to achieve wideband characteristic. The proposed antenna has a size of 40 mm × 40 mm × 5 mm and operates at a frequency range of 2.9-5.1 GHz. The analysis of the antenna performance was carried out when it was placed on the human body equivalent flat phantom. Simulated results show that S
₁₁
is lower than -10 dB and the isolation (|S
₂₁
|) is better than 15 dB across the UWB low band (3.1-4.8 GHz).