Patent ID: 7482991
Filing Date: 2009-01-27
Classification: H01Q

Abstract:
1. A planar antenna assembly, characterized in that it comprises a Planar Inverted F Antenna mounted on a printed circuit board and comprising i) a radiating element comprising first and second parts approximately perpendicular one to the other and being respectively located in a first plan facing and parallel to a ground plane mounted on a face of said printed circuit board and in a second plane perpendicular to said ground plane, ii) a feed tab extending from said second part to said printed circuit board and iii) a main slot having a chosen length and comprising a linear part defined in said second part at a chosen location between lateral sides of said radiating element and a meandered part extending said linear part into said first part, said second part being arranged such that without said main slot high and low frequency bands are equally capacitive and inductive respectively, and the length of said main slot being such that it is electrically quarter-wave long at approximately the geometric mean of said low and high frequency bands.