Patent ID: 6147653
Filing Date: 2000-11-14
Classification: H01P,H01Q,H03H

Abstract:
A balanced dipole antenna for a mobile phone having a signal source, transmit and receive circuits, and a printed wire board (PWB) having a ground plane formed thereon for the signal source and for the transmit and receive circuits, comprising:a radiator element formed of a conducting material;a counterpoise formed of a conducting material and electrically isolated from the PWB ground plane; anda signal balancing means coupled between the signal source and said radiator element and counterpoise to generate first and second signals, respectively, that are substantially equal in magnitude but out of phase by 180 degrees, said signal balancing means comprising:a first capacitor having a first end connected to an input terminal and a second end connected to a first output terminal;a first inductor having a first end connected to said first output terminal and a second end connected to said ground plane;a second inductor having a first end connected to said input terminal and a second end connected to a second output terminal, anda second capacitor having a first end connected to said second output terminal and a second end connected to said ground plane,wherein balanced currents are circulated in said radiator element and said counterpoise to thereby produce a symmetric radiation pattern.