Wideband mobile MIMO antenna for the metal cover phone

The 8 mobile service bands MIMO antenna that consists of both a monopole + IF A antenna and an auxiliary slot antenna on the metal cover is designed and implemented. Two antennas which are laid up and bottom side of the PC board are diagonally fed for the MIMO system. Auxiliary slot locates on the rear metal cover, and handles for LTE class 40 band. The S11 of antenna satisfies under -6dB (VSWR 3: 1) for L TE class 131 L TE class 141 CDMAI GSMI DCSI PCSI W-CDMAI LTE class 40 bands. ECC value for MIMO characteristic is less than 0.2 over the entire design bands. Average gains and antenna efficiencies measured in the anechoic chamber were -5.57~-1.45 dBi and 27.75~71.6 %, respectively.