Dual-band decoupling method for two MIMO antenna using trifurcation elements

Recently, the technology of MIMO (Multiple-Input Multiple-Output) using multiple antennas and CA (Carrier Aggregation) using multiple frequency bands are introduced in a mobile terminal. If plural MIMO antennas are installed closely, mutual coupling between the antennas must be reduced to suppress deterioration of radiation efficiency and increase of the correlation coefficient. In previous studies, a decoupling method for single-band using bifurcation elements has been confirmed. However, if operating for single-band, it is not possible to introduce CA technology. This paper proposes a decoupling method for dual-band using trifurcation elements.