Patent ID: 6515625
Filing Date: 2003-02-04
Classification: H01Q

Abstract:
In an antenna having an electrical reference plane and a planar conductive element having a length and a width, a system for providing multiple resonant frequencies comprising:a first coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a first antenna resonant frequency; a second coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a second antenna resonant frequency, said second coupling providing a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and the planar conductive element at said second resonant frequency; and wherein the first and second coupling means are spaced apart a distance, said distance being substantially the length of the planar conductive element and causing mutually deflecting currents to flow from each of the two coupling means to define said second resonant frequency.