A dual polarised antenna including two or more modules arranged along an antenna axis. Each module includes a radiating element, and four conductive walls which together form a frame around the radiating element. Each wall includes a distal edge and a pair of side edges. The side edges of the walls meet,...http://www.google.com/patents/US20040056818?utm_source=gb-gplus-sharePatent US20040056818 - Dual polarised antenna
