Patent ID: 6480155
Filing Date: 2002-11-12
Classification: H01Q

Abstract:
An antenna assembly for radio circuitry operable to communicate radio signals at least within a selected frequency range and having a ground part and a rf (radio frequency) part, said antenna assembly comprising:a first antenna element of a first lengthwise dimension, L-x, and having a dorsal side portion and a distal side portion, said first antenna element connected at a ground-part-connection location of the dorsal side portion thereof to the ground part of the radio circuitry and connected to the rf part of the radio circuitry at a rf-part-connection location, the rf-part-connection location spaced apart from the ground-part-connection location, said first antenna element, in isolation, resonant about a first resonant frequency, the first resonant frequency about which, in isolation, said first antenna element is resonant being related to an antenna transducer of length L-x; and a second antenna element also having a dorsal side portion and a distal side portion, said second antenna element spaced apart from said first antenna element by a first selected distance, l, and connected at a ground-part-connection location of the distal side portion thereof to the ground part of the radio circuitry, positioning of said second antenna element at the selected distance from said first antenna element offsetting the first resonant frequency at which said first antenna element is, in isolation, resonant, thereby to be resonant at a first offset frequency, the first offset frequency about which said first antenna element is resonant being related to an antenna transducer, in isolation, of length L, the first offset frequency within the selected frequency range.