The invention relates to a method for coupling a signal to an antenna structure, as well as to an antenna structure, which comprises at least two antenna elements (101, 102), a ground plane (105) for grounding the antenna structure, a coupling line (106) for coupling a first antenna element and a second...http://www.google.com.au/patents/US6498586?utm_source=gb-gplus-sharePatent US6498586 - Method for coupling a signal and an antenna structure
