The present invention refers generally to a new family of antenna arrays that are able to operate simultaneously at two different frequency bands, while featuring dual-polarization at both bands. The design is suitable for applications where the two bands are centered at two frequencies f1 and f2 such...http://www.google.de/patents/US6937206?utm_source=gb-gplus-sharePatent US6937206 - Dual-band dual-polarized antenna array
