Patent ID: 7924236
Filing Date: 2011-04-12
Classification: H01Q

Abstract:
1. A portable compact antenna formed from a dipole type element operating in a first frequency band and comprising a first conductive arm and at least one second arm, said first and second arms being interconnected at a level of a feed point to be differentially supplied, said second arm being constituted by a U-shaped conductive element, realized on an insulating substrate, said U-shaped conductive element comprising two branches linked together at the level of said feed point, wherein the second arm includes a second radiating element dimensioned to operate in a second frequency band, and constituted by a conductive element realised on the insulating substrate between the two branches of the U-shaped element, the length of the conductive element being determined by k*λ2/2−L 1 where λ2 is the wavelength at the central frequency of the second frequency band, k is a positive integer corresponding to a harmonic of the second frequency band and L 1 is the length of the first arm.