Abstract
AbstractThis article presents a flexible ultra‐wideband (UWB) antenna that can be used in wireless body area networks (WBAN). The antenna has a switchable slotted split ring resonator (SRR) structure on the radiating patch, which creates band‐notch functionality. The antenna has three switchable states: UWB and two band‐notched states at central frequencies of 5.5 and 3.5 GHz. The antenna has compact dimensions of 30 × 38 × 0.38 mm3 and is fabricated on an RT5880 substrate. Its impedance bandwidth ranges from 2.7 to 50 GHz (a relative bandwidth of 180%). The antenna's performance has been evaluated under deformation, and its impact on the human body has been assessed using the specific absorption rate (SAR) parameter. The antenna has been manufactured, and its key features have been measured, demonstrating good agreement with simulations. Due to its low SAR, minimal thickness, and UWB performance, the antenna is a good candidate for WBAN applications.
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