Design of UWB Wearable Conformal Antenna Based on Jean Material

Abstract

In this paper, a wearable ultra-wideband (UWB) microstrip antenna is designed to meet the demand for Wireless Body Area Network (WBAN). This is a wearable textile antenna, which was formed on a jeans fabric substrate to reduce surface-wave losses. The single-fed circular strip monopole antenna provides good impedance matching over the entire UWB frequency range of 2.9∼10.6 GHz. The dielectric constant ε r = 2.2, and the loss tangent tan δ = 0.04 of the jean substrates are measured by using the coaxial ring method. The proposed antenna consists of an improved circular radiation patch with the defective ground structure to expand the frequency band of the antenna and improve the radiation characteristics of the antenna with small dimensions of 20 × 30 × 1.4 mm 3 . In addition, structural deformation of the proposed antenna is performed to analyze the flexibility of the proposed antenna. The simulated SAR values follow the FCC limit, making it most suitable for wearable applications.

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.…”

“…5,29,40,50 The proposed antenna also provides better gain than previous literature. 5,[7][8][9][11][12][13]17,18,34,38,46,50 Better efficiency is also achieved when compared to other studies. 5,7,12,18,38,40,46 This proves that the antenna proposed is a better candidate for body-centric communications.…”

“…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.…”

“…The ultra‐wide bandwidth was achieved using defected ground plane with the overall dimension being a bit more. In Chen et al, 9 an UWB wearable antenna with slots in patch and ground made with jean material is presented. The antenna exhibits omnidirectional radiation pattern with good gain, but the transient analysis was not performed.…”