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Wireless body area networks (WBAN) is used to measure patients' health conditions continuously. Different kinds of sensors are required to measure health conditions. When such types of antennas are used on the human body, they are flexible with the movements. The usage of wearable devices is currently increasing in the biomedical field. The presented wearable antenna is suitable for biomedical applications. The presented ultra-wideband (UWB) flexible parachute shape wearable antenna is fabricated on a jeans textile substrate. The prototype antenna has a À10 dB measured impedance bandwidth of 5800 MHz (7 to 12.8 GHz) with average radiation efficiency of 75.28%. The prototype antenna's size is 40 Â 40 mm 2 (1.32 Â 1.32 λ 2 0 at centre frequency 9.9 GHz) and a peak gain of 4.5 dB at 12.33 GHz. The fabricated antenna is suitable for biomedical applications in X-band frequencies and can be implemented with a low-cost manufacturing process. The radiating element is made by conductive copper tape. Muscle-equivalent phantoms are used to analyze the body effect on antenna performance. The radiation effect emitted by the presented antenna on the human body is calculated by the specific absorption rate (SAR) value. The maximum SAR value of the proposed antenna is 1.84 W/kg at 12.33 GHz. This leads to promising results for wearable applications related to remote health care monitoring, such as biotelemetry and mobile health with a sensor-driven approach.flexible antenna, low profile, textile substrate, ultra-wideband (UWB), wearable applications, wireless body area networks (WBAN) | INTRODUCTIONRecently, textile antennas for Wireless body area networks (WBAN) applications have been increased due to their essential features, including size miniaturization, comfortable design, robustness, and weight. Moreover, this type of antenna has compatibility with microwave technologies, has low assembly cost, and ease of fabrication. 1,2 The main features of ultra-wideband (UWB) antennas are high speed, low noise, and power, robust multipath applications, higher precision ranges, and low-cost design. 3,4 The Federal Communication Commission (FCC) guidelines, 2002, proposed the UWB of 7.5 GHz for commercial use. 5 UWB antennas have long-range applications such as

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