Patent ID: 8054235

Claim:
An active magnetic antenna comprising: a ferrite bar containing a ferrite core; a low-noise transistor; and a winding on the ferrite core forming a frame magnetic antenna, wherein the frame magnetic antenna is connected with the low-noise transistor to amplify a signal received by the frame magnetic antenna, wherein a base of the low-noise transistor connects directly to a first winding contact, and a voltage applied to a second winding contact of the low-noise transistor shifts a voltage applied to a collector of the low-noise transistor, wherein an impedance of the frame magnetic antenna is adjusted by a change of voltage input to the collector the low-noise transistor, wherein the second winding contact is shunted to ground via an electro-static discharge diode, wherein a plurality of components of the active magnetic antenna are installed on a radio receiver circuit board, and wherein the frame magnetic antenna is installed on the radio receiver circuit board, whereby the ferrite bar is electromagnetically coupled with a hand of a user of a radio receiver in which the active magnetic antenna is installed.