Patent ID: 9711871
Date: 2017-07-18
CPC Classifications: H01Q

Claim:
1. A high-band radiator of a dual-band cellular base station 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, said at least one dipole spaced at a first distance above a ground plane of the dual-band cellular base station antenna; 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 having a length greater than the first distance, 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 a substantially tubular body made of conductive material and having a flange adapted for connection with the ground plane, 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 below the around plane, at least a portion of said feed stalk disposed within the internal cavity of 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, which is spaced at a second distance from said at least one dipole that is greater than the first distance.