A directive antenna operable in multiple frequency bands includes an active antenna element and at least one passive antenna element parasitically coupled to the active antenna element. The passive antenna element(s) have length and spacing substantially optimized to operate at (i) a fundamental frequency...http://www.google.fr/patents/US20030184492?utm_source=gb-gplus-shareBrevet US20030184492 - Dual band phased array employing spatial second harmonics
Dual band phased array employing spatial second harmonics
Numéro de demande: 10/292,384 Numéro de publication: US 2003/0184492 A1 Date de dépôt: 8 nov. 2002 Brevet délivré: US6753826 ( Date de délivrance 22 juin 2004)
