Novel Wideband MIMO Antennas That Can Cover the Whole LTE Spectrum in Handsets and Portable Computers

A dual resonant antenna configuration is developed for multi-standard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the LTE spectrum in portable communication equipment. The bandwidth that can be covered by each antenna exceeds 70% without using any matching or tuning circuits, with efficiencies that reach 80%. Thus, a dual configuration of them is capable of covering more than 30 LTE (4G) bands besides the existing 2G and 3G bands. 2x2 MIMO configurations have been also developed for the two wideband antennas with a maximum isolation and a minimum correlation coefficient between the primary and the diversity antennas.