Wearable,textile-based antennas get more and more attention for body-centric communications because it could be easily worn on body and integrated into clothes.Electro-textiles(e-textiles)are used as antenna patch and...Wearable,textile-based antennas get more and more attention for body-centric communications because it could be easily worn on body and integrated into clothes.Electro-textiles(e-textiles)are used as antenna patch and ground plane.The electromagnetic properties of the textiles play important roles in antenna design and performance.This paper focuses on the study of the electromagnetic properties of e-textiles for wearable antennas applications and mainly discusses the electromagnetic properties of e-textile cell and the influences of different woven densities and different e-textile materials to antenna performances.Simulation and measurement results show that if the e-textiles adopt woven pattern,then when the distance between two conductive fibers is within 2 mm,the e-textiles could be regarded as metal plane to design antennas.In addition,the results show that metalplated woven fabric could be used as metal plane to design antennas,while non-woven fabric shows distinct differences.展开更多
The aim of this work was to investigate the electrical resistance change of electro-textiles manufactured using cotton fabrics with stainless steel and silver plated PA yarns incorporation after being subjected to hom...The aim of this work was to investigate the electrical resistance change of electro-textiles manufactured using cotton fabrics with stainless steel and silver plated PA yarns incorporation after being subjected to home laundering, i.e. detergent washing and silicone softening. Electrical resistances of conductive yams inside the fabric structure were compared and discussed statistically before and after washing and softener application. Greatest changes in electrical resistances were observed with samples including silver plated PA yams. After five washing cycles with detergent, silicone softening agent is removed from yarns by washing, and thus conductivity increases. Further washing of e-textiles with detergent for five more cycles causes decrease in conductivity, because of chemical effects of detergent and mechanical effects of washing process such as abrasion due to friction. Detergent which has negative reactive sites bonds with metal ions reduces conductivity.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.61072136)the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.200700130046).
文摘Wearable,textile-based antennas get more and more attention for body-centric communications because it could be easily worn on body and integrated into clothes.Electro-textiles(e-textiles)are used as antenna patch and ground plane.The electromagnetic properties of the textiles play important roles in antenna design and performance.This paper focuses on the study of the electromagnetic properties of e-textiles for wearable antennas applications and mainly discusses the electromagnetic properties of e-textile cell and the influences of different woven densities and different e-textile materials to antenna performances.Simulation and measurement results show that if the e-textiles adopt woven pattern,then when the distance between two conductive fibers is within 2 mm,the e-textiles could be regarded as metal plane to design antennas.In addition,the results show that metalplated woven fabric could be used as metal plane to design antennas,while non-woven fabric shows distinct differences.
文摘The aim of this work was to investigate the electrical resistance change of electro-textiles manufactured using cotton fabrics with stainless steel and silver plated PA yarns incorporation after being subjected to home laundering, i.e. detergent washing and silicone softening. Electrical resistances of conductive yams inside the fabric structure were compared and discussed statistically before and after washing and softener application. Greatest changes in electrical resistances were observed with samples including silver plated PA yams. After five washing cycles with detergent, silicone softening agent is removed from yarns by washing, and thus conductivity increases. Further washing of e-textiles with detergent for five more cycles causes decrease in conductivity, because of chemical effects of detergent and mechanical effects of washing process such as abrasion due to friction. Detergent which has negative reactive sites bonds with metal ions reduces conductivity.
