Patent ID: 6054953
Filing Date: 2000-04-25
Classification: H01Q

Abstract:
A dual band antenna, comprising at least one antenna element including a number of substantially planar, mutually parallel radiating patches (1-3) being fed with microwave power from a feed network (6) via a coupling means (5a, 5b; 5'a, 5'b) at a ground plane layer (4) of an electrically conductive material, whereinsaid feed network is adapted to feed microwave power in at least two separate frequency bands, including a first, relatively low frequency band and a second, relatively high frequency band,a first one of said patches (2) being adapted to radiate microwave power in said first frequency band and being provided with an aperture (9a, 9b) so as to couple microwave power in said second frequency band to a second one (1) of said patches,the microwave power in said first frequency band being fed from said feed network (6) via said coupling means at said ground plane layer to said first patch (2), and the microwave power in said second frequency band being fed from said feed network (6) via said coupling means at said ground plane layer (4) and via said aperture (9a, 9b) in said first patch (2) to said second patch (1).