COMPACT, LOW PROFILE, SINGLE FEED, MULTI-BAND, PRINTED ANTENNA

摘要

Printed circuit (18) and two-shot molding techniques are used to form a metal radiating element (16), a metal ground plane element, a metal antenna feed, a metal short-circuiting strip and metal capacitive loading plates within small antennas that are buried within transmit/receive radio device such as mobile cellular telephones. Balanced and unbalanced, single-feed, two and three band antennas are provided wherein the radiating element (16) is laterally spaced from the ground plane element, to thereby provide an antenna having a very low profile or height, including antennas wherein the ground plane element and radiating element (16) are placed coplanar on the same surface of a PCB (18). A thin dielectric carriage (31) on a PCB allows for placing the metal capacitive loading plates on the sidewalls of the dielectric carriage (31), to thereby provide reactive loading of a radiating element that is on the top surface of the dielectric carriage (31).