Patent ID: 6421029
Filing Date: 2002-07-16
Classification: H01Q

Abstract:
A helical antenna comprising:a cylindrical member composed of a dielectric; a plurality of radiation elements provided in helical form spaced at intervals from each other on the outer surface of said cylindrical member; a circuit board that is arranged below said cylindrical member and on which is mounted a feeder circuit for supplying high-frequency energy to said radiation elements; and a connector composed of an insulating material that is arranged between the lower end of said cylindrical member and said circuit board and that has a plurality of connection pins that electrically connect the ends of each of said radiation elements and said circuit board; wherein said connector comprises a connector body that is formed from said insulating material, and wherein a lower portion of said connector body is formed with an outside diameter that is substantially equal to the outside diameter of said cylindrical member, and an upper portion of said connector body is formed with an outside diameter that allows insertion inside said cylindrical member with substantially no gap.