5G Mobile Phone with Eight Antennas
Professor Kin-lu Wong of the Department of Electrical Engineering researched the applicationa of multiple-input and multiple-output (MIMO) technology in mobile phones and developed the only practical design to date featuring eight antennas. Wong explained that because the main function of a mobile phone antenna is to receive signals, the eight-antenna design opens eight gates for signal transmission. For example, a mobile phone with single antenna requires 4 minutes to downlord a 500MB movie, whereas a mobile phone with eight antennas only requires 30 seconds for the same task under the same bandwidth. Testing results revealed that under 8 x 4 MIMO, eight-antenna devices reached a mobile traffic rate of 24.6 bps/Hz, four times faster than conventional single antenna devices did. Eight-antenna devices are expected to operate eight times faster than single antenna devices under 8 x 8 MIMO.