Dual Antenna Coupling Manipulation for Low SAR Smartphone Terminals in Talk Position

A rigorous analysis of the concept coupling manipulation utilizing two antennas suited to modern smartphone devices in talk position for voice calls is presented. By using optimum relative phase between elements, they can substantially reduce specific absorption rate (SAR) but still maintain efficiency due splitting power them and by exploiting a suitable level interelement coupling. The same antenna elements be used multiple-input–multiple-output (MIMO) when not without heavily degrading their fundamental capacity limit, this secondary importance. could applied frequency ranges mobile communications from 1.8 6 GHz where ground plane has sufficient form factor. Extensive simulations planar inverted-F (PIFAs) operating at 2.4 are carried out demonstrate conceptually how optimized SAR over 50% compared single element. reduction maintained regardless user’s head composition handling device position. Antenna prototypes measured verify handset away body with MIMO terminal antennas.