Patent ID: 6801168
Filing Date: 2004-10-05
Classification: H01Q

Abstract:
A planar double L-shaped antenna operable at two different frequency ranges comprising:a dielectric substrate; a patch line printed on a top of the dielectric substrate, the patch line having one end formed as a signal feed point; a ground metal plate printed on a bottom of the dielectric substrate; and first and second radiating elements wherein the first radiating element is formed at the other end of the patch line, the first radiating element being extended in a direction perpendicular to the patch line above and beyond the ground metal plate to shape as an inverted L and the second radiating element is adjacent the first radiating element, the second radiating element being extended beyond the ground metal plate to shape as an inverted L, and the second radiating element being spaced apart from the first radiating element and extended in a direction opposite to that of the first radiating element so that the first and the second radiating elements are capable of receiving signals having different frequencies.