Low profile two-antenna assembly having a ring antenna and a concentrically-located monopole antenna

摘要

A disk-shaped two-antenna assembly contains a CP ring-antenna and a linear-monopole-antenna. The bottom surface of a ring-shaped dielectric member holds a ground plane. A circular radiating element is located on a top surface of the ring-shaped dielectric member. A linear radiating element is positioned coincident with a central axis of the two-antenna assembly, and a top end thereof carries a metal disk that extends perpendicular to the central axis of the two-antenna assembly. A centrally-located void lies between the ground plane and the metal disk to provide for the housing of electronic components. Metal RF shields are electrically connected to the ground plane and are located at the top portion of this void, intermediate the bottom-located ground plane and the top-located metal disk.