Wei He Ronghong Jin JunPing Geng Guomin Yang Wideband 3/4 Elliptical Ring Patch for Millimeter-Wave Communication. 3742-3744 2007 90-B IEICE Transactions 12 http://dx.doi.org/10.1093/ietcom/e90-b.12.3742 db/journals/ieicet/ieicet90b.html#HeJGY07