An automatically tuneable antenna design with GPS dead reckoning switch for multiband laptop and mobile cellular phone applications to the human body

A simple structure designed antenna for 2G/3G/4G mobile communication applied to notebook computer and mobile phone is proposed and analyzed by FDTD (Finite Difference Time Domain) in this study. The proposed tunable antenna has great characteristics of simple structure, easy production, low cost, good impedance matching, and wideband frequency. The antenna main structure is printed on FR4 single-sided PCB which is bonded to metal bracket. This proposed antenna covers GSM and WCDMA multi bands and satisfies notebook computer (laptop) and mobile cellular phone WWAN (Wireless Wide Area Network) system. The bandwidth of each band is matched with the desirable values for the laptop and mobile phone multiband requirement. For the biometry applications the investigation of the body effect on the tunable antenna radiation characteristics is achieved by auto GPS DR Switch. The human tissue includes single layer of muscle and multi-layer tissue. Simulated results illustrate that the included current in fat layer is very small due to the lower dielectric constant and conductivity. After adding a floating metal, the absorbed energy of human tissue will be reduced.