Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/01/01 Vol. E95-BNo. 1pp. 18-26 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010) Category: Antennas Keyword: printed dipole, broadband antenna, mutual coupling, antenna array, MIMO, cognitive radio,