| 主权项 |
1. A high-band radiator of a dual-band cellular basestation antenna, said dual bands comprising low and high bands, said high-band radiator comprising:
at least one dipole comprising two dipole arms made of conductive material adapted for said high band; a feed stalk for feeding said at least one dipole comprising a non-conductive dielectric substrate body and conductors formed on said substrate body adapted to function as a balun transformer, said feed stalk connected with said at least one dipole at one end and having at least one feed connector at the other end, said conductors coupled to said at least one dipole and said at least one feed connector; and substantially tubular body made of conductive material and having a flange adapted for connection with a groundplane of said dual-band cellular basestation antenna, said tubular body being electrically connected, either directly or by capacitive coupling, through said flange to the ground plane at the open end and short-circuited at the other end to define an internal cavity of said tubular body, at least a portion of said feed stalk disposed within said tubular body through the open end, said tubular body adapted to have said feed connectors extend through said tubular body at the short circuited end. |
