Bandwidth‐Enhanced Ultra‐Wide Band Wearable Textile Antenna for Various WBAN and Internet of Things (IoT) Applications

Abstract

This paper presents a compact asymmetric CPW fed monopole antenna using Denim fabric as substrate applicable for UWB communication and various wireless body area networks (WBANs). The geometry of the antenna consists of a circular monopole antenna with a modified ground plane and introduction of defected ground structures (DGS) to achieve ultra-wide band (3.10-10.6 GHz) characteristics. The proposed wearable antenna operates from 2.40 to 14.88 GHz providing a fractional bandwidth (FBW) of about 144.44%. Enhancement of the bandwidth is obtained by the insertion of open ended rectangular slit in the ground plane. The final antenna produces a peak gain of about 6.57 dBi at 13.05 GHz and achieved omnidirectional radiation patterns. In terms of return loss, gain, and radiation characteristics, the lightweight flexible wearable antenna is fabricated, and the tested effects are found to be in fair accordance with the simulated ones. DE ET AL.

On the design and analysis of a miniaturized ultra‐wideband (UWB) antenna using quatrefoil‐shaped nonuniform meta‐surfaces for body‐centric communications

“…Also, except De et al, 7 the proposed antenna offers higher bandwidth than all the antennas given in the table and higher bandwidth with dual mode operation than the previous studies 5,29,40,50 . The proposed antenna also provides better gain than previous literature 5,7–9,11–13,17,18,34,38,46,50 . Better efficiency is also achieved when compared to other studies 5,7,12,18,38,40,46 .…”

“…It is understood from Table 5 that the proposed antenna is smaller in size (length  width) than the antennas in literature 7,8,12,13,18,29,40,50 and lesser in thickness than. 5,7,9,11,13,17,18,29,34,38,40 This lesser thickness of the antenna results in reduced overall volume. Also, except De et al, 7 the proposed antenna offers higher bandwidth than all the antennas given in the table and higher bandwidth with dual mode operation than the previous studies.…”

“…It is understood from Table 5 that the proposed antenna is smaller in size (length × width) than the antennas in literature 7,8,12,13,18,29,40,50 and lesser in thickness than 5,7,9,11,13,17,18,29,34,38,40 . This lesser thickness of the antenna results in reduced overall volume.…”

“…This reduced quality factor leads to subsequent increase in bandwidth. 33,35,36 This can be understood through the relation in Equation (7). 36 Bandwidth ¼…”

“…The antenna is made of flexible jean substrate with a bandwidth of 5.8 GHz, which does not cover the entire UWB band. A CPW‐fed monopole antenna with denim substrate is presented in De et al 7 The antenna provides good bandwidth and gain using defected ground structures with omnidirectional radiation for on body applications only. A dewdrop‐shaped UWB antenna in Thangarasu et al 8 is made of four different substrates.…”