Patent ID: 7522122
Filing Date: 2009-04-21
Classification: H01Q

Abstract:
1. A planer antenna structure comprises: a first planer helical antenna having a first axial orientation, wherein the first planer helical antenna has a first helical conductive pattern on a first surface of a supporting substrate and a second helical conductive pattern on a second surface of the supporting substrate, wherein the first and second helical conductive patterns of the first planer helical antenna are interconnected; a second planer helical antenna having a second axial orientation, wherein the second planer helical antenna has the first helical conductive pattern on the first surface of the supporting substrate and the second helical conductive pattern on the second surface of the supporting substrate, wherein the first and second helical conductive patterns of the second planer helical antenna are interconnected; and a ground pattern on the second surface of the supporting substrate to provide a ground connection for the first and second planer helical antennas, wherein the ground pattern is approximately centered at an intersection of the first and second axial orientations and the first and second planer helical antennas are off-center of the intersection of the first and second axial orientations.