Patent ID: 6400331
Filing Date: 2002-06-04
Classification: G03H,H01Q

Abstract:
A dipole antenna comprising:a tubular feeding part and first and second antenna parts formed in one piece of an insulating material, said first and second antenna parts being extended from one end of said feeding part in opposite directions and having a length nearly equal to Â¼ of the effective wavelength &lgr;; a first antenna element formed by a metal-plated layer all over said first antenna part and extending to the edge of a through hole of said feeding part; a second antenna element formed by a metal-plated layer all over said second antenna part; a through hole formed by a metal-plated layer deposited all over the interior surface of said through hole and connected to said first antenna element; an outer conductor formed by a metal-plated layer deposited all over the outer peripheral surface of said feeding part and connected to said first and second antenna elements; and a pair of slits cut in said outer conductor between said first and second antenna elements, said pair of slits extending a length about &lgr;/4 from one end of said feeding part.