Patent ID: 7548207

Claim:
A circularly polarized antenna, comprising: a dielectric substrate having opposite first and second surfaces; a closed-loop radiating element formed on said first surface of said dielectric substrate; a micro-strip radiating element formed on said first surface of said dielectric substrate, surrounded by said closed-loop radiating element, and including first and second segments, each of which has opposite first and second ends, said first ends of said first and second segments of said micro-strip radiating element defining a first distance therebetween, said second ends of said first and second segments of said micro-strip radiating element being coupled to said closed-loop radiating element and defining a second distance therebetween larger than the first distance; a feeding element formed on said first surface of said dielectric substrate, surrounded by said closed-loop radiating element, coupled to said first ends of said first and second segments of said micro-strip radiating element, and operable so as to receive an input signal, and so as to divide a power of the input signal into first and second components that are ninety degrees out-of-phase; and a grounding element formed on said second surface of said dielectric substrate.