MIMO performance study of different antennas for LTE mobile phones in CTIA test mode

This paper reports a study of body loss for LTE MIMO antennas in mobile phones with the effects of different mobile phone lengths. Two designs of dual elements MIMO antenna (dual Semi PIFA and co-located antenna) are studied under two typical LTE and mobile phone frequency points (0.85GHz and 1.9 GHz) with three mobile phone lengths (110mm, 130mm and 150mm). And the performance of correlation and multiplex efficiency are also evaluated. The simulations are carried out on talking position in CTIA standard. In order to verify the simulation results, the measurements for the dual semi PIFA are carried out as well. The analysis for the results provides novel and useful information for the design of LTE MIMO antennas in mobile phones for body loss optimization.