| Summary: | A triple-notch band planar ultra-wideband (UWB) antenna is proposed for wireless body area networks (WBANs) to suppress unwanted signals of conventional narrow band communication technologies. These notch bands are WiMAX (3.3–3.8 GHz), WLAN (5.1–5.825 GHz), and <inline-formula> <tex-math notation="LaTeX">${X}$ </tex-math></inline-formula>-band downlink satellite communication systems (7.25–7.75 GHz). A complementary split ring resonator slot and two L-shaped stubs are introduced on an elliptical-shaped radiating patch to obtain UWB coverage from 2.9 to 12 GHz with three notch bands. The overall antenna structure is fabricated on FR4 substrate with a size of <inline-formula> <tex-math notation="LaTeX">$12\,\,\text {mm} \times 19\,\,\text {mm}$ </tex-math></inline-formula> which provides a size reduction of more than 42% with respect to recent literature. The simulated and measured results indicate that the proposed antenna is a good candidate for WBAN applications.
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