A Compact Printed Multi-band Antenna for Laptop Applications
This study proposes a compact printed multi-band antenna,which has the advantages of simple structure,small size,easy fabrication,and making integration within thin laptop.The main operating frequencies of the proposed antenna are at GPS(1.575 GHz),WLAN(2.4,5.8 GHz),Bluetooth(2.45 GHz)and WiMAX(2.5,3.5,5.5 GHz)bands.The main structure of the antenna is composed of T-shaped monopole and grounded inverted L-shaped branch.The T-shape monopole excites 2.4 GHz operating frequency band.And,the grounded inverted L-shaped branch not only can excite 3.5 GHz operating band but also can be used for impedance matching,which can tune the bandwidth of each operating band.A branch is added on the left part of T-shaped monopole which can excite GPS band(1.575 GHz).Finally,the 5.5 GHz operational frequency of WiMAX can be excited by adding a stub on the T-shaped monopole branch.Therefore,a multi-band antenna for laptop applications is achieved.The antenna occupies a small area of 9×47mm2 only.This antenna is fed on the T-shaped monopole by a 50-Ω coaxial cable.The measured result shows that the 10 dB return loss is satisfied at each operating band,and has a good agreement with simulated result.Moreover,the gain,radiation efficiency and radiation pattern of each operating center frequency were also simulated and measured.They demonstrate very good performances.The gain is about 1.25~6.38 dBi and radiation efficiency ranges from 67%to 95%at each band.The measured radiation pattern is similar to general monopole antenna.The characteristics of the antenna make it attractive for practical application in laptops.
Cheng-Chi Yu Jiin-Hwa Yang Chang-Chih Chen Wen-Chao Hsieh
Department of Communications Engineering,Feng-Chia University No.100,Wen-Hua Rd.,Seatwen,Taichung 40 Program in Electrical and Communications Engineering,Feng-Chia University No.100,Wen-Hua Rd.,Seatwen
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
611-614
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）