Impact of Multiantenna Real Estate on Diversity and MIMO Performance in Mobile Terminals

In this letter, the impact of antenna real estate is investigated and generalized to multiantenna diversity and multiple- input-multiple-output (MIMO) performance. In particular, an extensive study of two-antenna capacitive coupling elements with different antenna volumes and locations in a small mobile terminal is presented. The discussion reveals the optimally compact two-antenna system that can attain promising 80% and 100% MIMO performance separately at the lower (698-960 MHz) and higher (1710-2690 MHz) frequencies for next-generation mobile communications.