Patent ID: 7528781

Claim:
A circularly polarized antenna comprising: a dielectric substrate having a front surface and a rear surface; a feeding member mounted on the front surface of the dielectric substrate and having a first conductor being longitudinal, mounted on the front surface of the dielectric substrate and having a proximal end and a distal end; a feeding point formed on the distal end of the first conductor; a second conductor being longitudinal, connected to the first conductor and having a first end connected to the proximal end of the first conductor; and a second end; a first signal point formed on the second end of the second conductor; a connecting conductor formed on and protrudes perpendicularly from the proximal end of the first conductor, having two connecting ends and one connecting end connected to the proximal end of the first conductor; a third conductor being longitudinal, formed on and protruding from the other connecting end of the connecting conductor, being parallel to the second conductor and having a first end connected to the connecting end of the connecting conductor; and a second end; and a second signal point formed on the second end of the third conductor; a coupling member mounted on the front surface of the dielectric substrate and connected to and protruding from the second signal point; a ground plane being rectangular, mounted on the rear surface of the dielectric substrate and having four edges, four corners and two extension conductors being L-shaped, formed on and protruding from one edge of the ground plane, extending respectively along adjacent corners and being symmetrical relative to a symmetrical line along which the coupling member lies; a support mounted perpendicularly on the front surface of the dielectric substrate, connected to the first signal point of the feeding member and having a rear end mounted on front surface of the dielectric substrate; and a front end; and a radiating patch mounted on the front end of the support and connected to the feeding member through the support.