Ultra-wideband Textile Antenna Research Articles

Design of UWB Band Notch Textile Antenna for Body-Centric Wireless Network with the Comparison of Five Different Textile Substrates

Designing an effective antenna on textile substrate is quite a challenging issue which needs close monitoring of antenna return loss performance, gain, radiation pattern, efficiency etc. This paper presents the basic design of Ultra Wideband (UWB) band notch textile antenna for body-centric wireless network. Moreover, Wireless Communication is a notable communication practice and the UWB body-centric wireless communication is one of the foremost attractive ones. Hence, to design the UWB textile antenna, five different substrates have been used and analyzed for better performance evaluation. Textile substrates make the antenna wearable, and therefore can be used in sport monitoring, and in different medical applications as well. Comparing the designed antenna with five different substrates, finally the antenna is proposed with 100% Polyester substrate because among the other four textile substrates, it shows better and also has the intended antenna performance.

Ultrawideband Textile Antenna for Wearable Microwave Medical Imaging Applications

This article presents the design of a novel low-profile ultrawideband textile antenna for wearable microwave medical imaging systems. The proposed antenna is based on a monopole structure, where two triangles and a few parallel slots are cut at the bottom corners and top edge of the radiation patch, respectively, to achieve an optimized ultrawide bandwidth and a reduced size of the antenna. Polyester fabrics and conductive copper taffeta, which are universally available on the market, are selected to construct the antenna. Thus, the fabricated prototypes well suit the needs of wearable applications, where flexible components are required to conform to the curved human bodies. The measured results show that the antenna prototype can realize a bandwidth of 109% from 1.198 to 4.055 GHz, with a realized gain of 2.9 dBi. Furthermore, the on-phantom measurements show that there is limited effect on the operating bandwidth and realized gain of the antenna when it is working in the proximity to human bodies. The antenna is used to monitor the recovery process of a bone fracture that is emulated by a body-mimicking phantom with a size-varying blood strip. The time-domain reflection coefficient of the antenna varies significantly with the size of the fracture introduced, which demonstrates the applicability of the antenna for such use scenarios in microwave medical imaging.

Design of Ultra-wideband Textile Antenna for TV Broadcasting

Design of Ultra-wideband Textile Antenna for TV Broadcasting

Ultra-wideband textile antenna with circular polarization for GPS applications and wireless body area networks

In this paper, a novel textile antenna with a semi elliptical ground plane is designed for ultra-wideband applications. Conductive woven fabric made of stainless steel/polyester (80/20%) spun yarn with 158 Ω/m linear resistance is used to design the ground and the patch of antenna. Moreover, the warp density and weft density of woven fabric are selected in a way that it gets high value of surface conductivity. The surface conductivity of woven fabric was 0.088 Ω/sq. The proposed antenna is made of triangle patch within a transmission line and its dimensions are optimized using the genetic algorithm. Results show that the proposed antenna achieves multi impedance bandwidth ranging from 1.4 to 1.6 GHz, 1.8 to 2.4 GHz, and 3.4 to 11.6 GHz (reflection coefficient <−10 dB). The antenna in both bands from 1.4 to 1.6 GHz and 1.8 to 2.4 GHz is circularly polarized. This impedance bandwidth makes it appropriate for many wireless communication systems such as GPS, Wifi, PCS-1900, IMT-2000/UMTS, and ultra-wideband applications.

Design & Performance of Wearable Ultra Wide Band Textile Antenna for Medical Applications

AbstractThe concept of wearable products such as textile antenna are being developed which are capable of monitoring, alerting and demanding attention whenever hospital emergency is needed, hence minimizing labour and resource. In the proposed work by using textile material as a substrate the ultra wideband antenna is designed especially for medical applications.Simulated and measured results here shows that the proposed antenna design meets the requirements of wide working bandwidth and provides 13.08 GHz bandwidth with very small size, washable (if using conductive thread for conductive parts) and flexible materials. Results in terms of bandwidth, radiation pattern, return loss as well as gain and efficiency are presented to validate the usefulness of the current proposed design. The work done here has many implications for future research and it could help patients with such flexible and comfortable medical monitoring techniques.

Design of a textile ultra‐wideband antenna with stable performance for body‐centric wireless communications

The study proposes a flexible ultra-wideband (UWB) textile antenna for body-centric wireless system. The antenna consists of a circle-shaped radiator, a tapered microstrip-fed line and a ground plane with a rectangular slot. For body-centric applications, a cloth with 100% cotton is used as the substrate in the design of the antenna. To emulate the on-body condition, the antenna is studied when it is bent and crumpled, and when the feed line and ground plane are misaligned because of human body movement. The antenna is studied using computer simulation, and is also prototyped and measured for verification of simulation results. The feeding cable used in measurement affects the measured results, which is also studied. Simulated and measured results agree very well. Results show that the flexible UWB textile antenna has good performance in terms of bandwidth, realised gain, efficiency and radiation patterns, making it a good candidate for body-centric wireless communications.