A multi-band antenna includes a first pole (2) and a second pole (3) connecting with the first pole. The first and second poles are both made of metal sheets. The first pole is rectangular in shape. The second pole includes a first section (31), a second section (32) and a third section (33). The second...http://www.google.de/patents/US6864854?utm_source=gb-gplus-sharePatent US6864854 - Multi-band antenna
