Use of Frequency Selective Surface to Prevent SAR and Improve Antenna Performance of Cellular Phones
The purpose of this study is to design the low-cost planar inverted-F antenna(PIFA)applicably built in cellular phones with finite integration technique(FIT)for simulation of surface current distribution,radiation efficiency,radiation pattern,and gain.The prototype antenna is constructed with aluminum foil and low-cost FR4 PCB substrate.The antenna is designed with quarter wavelength(λ/4)of resonant frequencies and fed with 50-matching microstrip.It owns the industrial demanding characteristics of light weight,compactness,low profile,and easy fabrication.The target frequency band is designed for the following cellular phone systems: GSM(Global system for mobile communication: 880960 MHz),DCS(Digital communication system: 1.71-1.88 GHz,PCS(Personal communication system: 1.85-1.99 GHz),and IMT-2000(3G:(1.92-2.17 GHz).However,since the bio-effect of specific absorption rate(SAR)by cellular phone gains popular concern,we also try to utilize the unique band-stop or band-pass features of frequency selective surface(FSS)to reduce the SAR.Finally,we design the finite size 2-dimensional periodic structure to integrate with antenna for SAR reduction by decreasing backward radiation.The result shows that the integrated PIFA-FSS module not only reduces the SAR but also improve the antenna gain and radiation efficiency of the cellular phone.
Han-Nien Lin Ke-Wen Lin Sheng-Chun Chen
Department of Communications Engineering,Feng-Chia University 100 Wen-Hua Rd.,Taichung 40724,Taiwan, Department of Electrical Engineering,National Chiao-Tung University 1001 University Road,Hsinchu 300
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
214-218
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）