RT info:eu-repo/semantics/article
T1 Wireless body area networks: UWB wearable textile antenna for telemedicine and mobile health systems
A1 Yadav, Ashok
A1 Kumar Singh, Vinod
A1 Kumar Bhoi, Akash
A1 Marques, Gonçalo
A1 Garcia Zapirain, Begonya
A1 Torre Díez, Isabel de la
K1 Comunicaciones inalámbricas
K1 Telemedicina
K1 Radiación
K1 Textile antenna
K1 Ultra-wideband
K1 Circuit theory
K1 SAR
K1 Antena textil
K1 Banda ultraancha
K1 Teoría de circuitos
K1 RAE
K1 3325 Tecnología de las Telecomunicaciones
AB A compact textile ultra-wideband (UWB) antenna with an electrical dimension of 0.24λo × 0.24λo × 0.009λo with microstrip line feed at lower edge and a frequency of operation of 2.96 GHz is proposed for UWB application. The analytical investigation using circuit theory concepts and the cavity model of the antenna is presented to validate the design. The main contribution of this paper is to propose a wearable antenna with wide impedance bandwidth of 118.68 % (2.96–11.6 GHz) applicable for UWB range of 3.1 to 10.6 GHz. The results present a maximum gain of 5.47 dBi at 7.3 GHz frequency. Moreover, this antenna exhibits Omni and quasi-Omni radiation patterns at various frequencies (4 GHz, 7 GHz and 10 GHz) for short-distance communication. The cutting notch and slot on the patch, and its effect on the antenna impedance to increase performance through current distribution is also presented. The time-domain characteristic of the proposed antenna is also discussed for the analysis of the pulse distortion phenomena. A constant group delay less than 1 ns is obtained over the entire operating impedance bandwidth (2.96–11.6 GHz) of the textile antenna in both situations, i.e., side by side and front to front. Linear phase consideration is also presented for both situations, as well as configurations of reception and transmission. An assessment of the effects of bending and humidity has been demonstrated by placing the antenna on the human body. The specific absorption rate (SAR) value was tested to show the radiation effect on the human body, and it was found that its impact on the human body SAR value is 1.68 W/kg, which indicates the safer limit to avoid radiation effects. Therefore, the proposed method is promising for telemedicine and mobile health systems.
PB MDPI
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/58958
UL https://uvadoc.uva.es/handle/10324/58958
LA eng
NO Micromachines 2020, vol.11, n.6, 558
NO Producción Científica
DS UVaDOC
RD 11-jul-2024