Patent ID: 7268731
Filing Date: 2007-09-11
Classification: H01Q

Abstract:
1. A folded monopole antenna, comprising: a first planar section, having a first dimension and a second dimension, that forms a substantially continuous surface over the first and second dimensions, the first dimension substantially defining a first resonance frequency supported by the folded monopole antenna; a second planar section, having a first dimension and a second dimension, that forms a substantially continuous surface over the first and second dimensions, the second planar section substantially parallel to the first planar section, the first and second planar sections having respective first and second dimensions combining to substantially define a second resonance frequency supported by the folded monopole antenna; a third section coupling the first planar section to the second planar section; an input feed coupled to the first planar section at a first location being at a first non-zero distance from the third section and adapted to feed Radio Frequency (RF) signals to or from the folded monopole antenna and an external device, a distance between the first location and a centerline of the first planar section contributing to a first bandwidth at the first resonance frequency; and a reactance coupled to the second planar section and a ground plane at a second location of the second planar section being at a second non-zero distance from the third section, a distance between the first and second locations from a centerline of the first and second planar sections contributing to a second bandwidth supported by the folded monopole antenna at the second resonance frequency, wherein the first non-zero distance and the second non-zero distance are substantially the same.