Abstract
This research presents an ultra-wideband (UWB) textile antenna design for body-centric applications. The antenna is printed on a 1 mm thick denim substrate with a 1.7 relative permittivity. The jeans substrate is sandwiched between a partial ground plane and a radiating patch with a Q-shaped slot. The slotted radiating patch is placed above the substrate and measures 27.8 mm × 23.8 mm. In free space, the antenna covers the ultra-wideband spectrum designated by the Federal Communication Commission (FCC). Various parameters of the antenna design were changed for further performance evaluation. Depending on the operating frequency, the antenna's realized gain varied from 2.7 to 5 dB. The antenna achieved high radiation efficiency with an omnidirectional radiation pattern. A parametric study was performed in research on varying antenna substrates and other components of the antenna. The three outermost layers of the human body are used to model a human phantom for on-body simulation. After that, the antenna was placed at five different distances from the phantom. The findings demonstrate that at close distances to the phantom, the antenna's gain and efficiency at lower frequencies are reduced. The antenna's radiation efficiency and gain were much higher at higher frequencies for distances greater than 6 mm. Compared to free space, the antenna's radiation pattern was more omnidirectional, especially at higher frequencies. This antenna is novel, compact and has an ultra wide bandwidth, a maximum of 94.60% radiation efficiency and a 5 dBi gain that will make it a good candidate for body-centric communications.
Highlights
The Federal Communication Commission (FCC) designated 3.1–10.6 GHz as Ultra-wideband (UWB) for unlicensed usage in 2002
The human body is a challenging environment for UWB operation, especially for textile antennas
5 Conclusion A slotted-patch textile antenna based on a jeans substrate was proposed in this research work
Summary
The FCC designated 3.1–10.6 GHz as Ultra-wideband (UWB) for unlicensed usage in 2002. UWB provides high data security and avoidance of multi-path fading. These features make UWB very attractive and, for decades, has been the primary choice for communication devices [1,2]. The design of a UWB antenna, for a Wireless Body Area Network(WBAN), is difficult. WBAN comprises the Body-centric Wireless Network (BCWN), which is a network of sensors positioned around the human body. These sensors can collect critical physiological information [1–3]. These measured physiological data from various sensors will be sent to a body-worn base unit and from there the data can be sent wirelessly to the hospital or emergency care givers for real time patient monitoring scenarios in healthcare
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