Patent ID: 7495626
Filing Date: 2009-02-24
Classification: H01Q

Abstract:
1. An antenna for generating radiation corresponding to a signal from a radio frequency communications device having a first signal terminal and a second signal terminal, the antenna comprising: a. a substantially cylindrical conductor; b. a first spiral-wound flat inductor, having a first interior end and a first exterior end, the first exterior end electrically coupled to the first signal terminal of the radio frequency communications device, the first spiral-wound flat inductor being substantially coaxial with the cylindrical conductor; c. a second spiral-wound flat inductor, having a second interior end and a second exterior end, the second spiral-wound flat inductor being spaced apart from the first spiral-wound flat inductor and substantially coaxial therewith, the first interior end electrically coupled to the second interior end, the second exterior end electrically coupled to the second signal terminal of the radio frequency communications device, the second spiral-wound flat inductor being substantially coaxial with the cylindrical conductor; and d. a reactive element electrically coupled to one of the first exterior end and the second exterior end, the first spiral-wound flat inductor wound in relation to the second spiral-wound flat inductor so that when a current flows from the first signal terminal to the second signal terminal, a first magnetic field is generated from the first spiral-wound flat inductor and a second magnetic field is generated from the second spiral-wound flat inductor, the first magnetic field in an opposite direction from the second magnetic field, the substantially cylindrical conductor disposed so as to intersect the first magnetic field and the second magnetic field.