| 摘要 |
<p>A WIDEBAND ANTENNA (10) FOR COGNITIVE RADIO SYSTEMS COMPRISING A RING PATCH (14) SECULRELY POSITIONED ON AN FR4 SUBSTRATE (18), A PREDEFINED RADIATING PATCH (11) ETCHED ON THE FR4 SUBSTRATE (18), POSITIONED AT THE CENTRE OF THE RING PATCH (14), A MICROSTRIP FEED LINE (13) CONNECTED TO THE BOTTOM PART OF THE RING PATCH (14), A GROUND PLANE (12) POSITIONED AT THE OPPOSITE SIDE OF THE FR4 SUBSTARATE (18) AND THE RADIATING PATCHES (11, 14) AT LEAST A PAIR OF SYMMETRIC SLOTS (15) POSITIONED AT THE GROUNG PLANE (12), AND A GAP (16) FORMED BETWEEN THE FR4 SUBSTRATE (18) AND THE GROUND PLANE (12), CHARACTERIZED IN THAT THE PREDEFINED SHAPE RADIATING PATCH (11) IS A LOGO MARK.</p> |
