Yongho Kim Toshiteru Hayashi Yoshio Koyanagi Hisashi Morishita Compact Built-In Handset MIMO Antenna Using L-Shaped Folded Monopole Antennas. 1743-1751 2008 91-B IEICE Transactions 6 http://dx.doi.org/10.1093/ietcom/e91-b.6.1743 db/journals/ieicet/ieicet91b.html#KimHKM08