Broadband characteristic of dual-band decoupling for closely spaced antennas

摘要

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 dual-band using trifurcation elements has been confirmed. This paper proposes a broadband technique with branch elements.