Eight-Element MIMO Handset Based on Combinatory Feeding

To meet the needs of continuously increasing wireless data consumption, new antenna design schemes are needed. Combinatory feeding is a recently introduced method that utilizes a configurable multiport excitation to create simple frequency configurable antennas. This paper investigates the feasibility of implementing a combinatorially fed antenna capable of 8×8 MIMO in 1.5-6.5 GHz frequency range and 2×2 MIMO in 0.7-0.9 GHz frequency range. A prototype antenna is manufactured and measured results demonstrate, that the method is capable of producing antennas of wide bandwidth.