Patent ID: 6407705
Filing Date: 2002-06-18
Classification: H01Q

Abstract:
An antenna structure, comprising:a ground plane; a layer of dielectric material having a first surface overlying said ground plane and an opposing second surface; an electrically conductive layer overlying said second opposing surface of said dielectric layer, said electrically conductive layer being differentiated into a plurality of antenna elements including a driven antenna element and first and second non-driven, parasitic antenna elements, each of said driven and first and second non-driven elements having a shape of a parallelogram having parallel first edges of length L and parallel second edges of length W, wherein one of said first edges of said first parasitic element is disposed substantially along one of said first edges of said driven element at a gap width WG, and wherein one of said first edges of said second parasitic element is disposed substantially along the opposite one of said first edges of said driven element at said gap width WG; each of said driven and first and second non-driven antenna elements including respective means for shorting said electrically conductive layer to said ground plane at a region proximate to one of said second edges of said electrically conductive layer; each of said driven and first and second non-driven antenna elements having a respective resonant frequency, wherein said respective resonant frequency of said each of said driven and first and second non-driven antenna elements is varied from said resonant frequencies of other of said driven and first and second non-driven antenna elements using only characteristics of said respective means for shorting; means for coupling radio frequency energy to said driven antenna element of said electrically conductive layer.