AM antenna noise reducing

Details AM antenna noise reducing AM antenna noise reducing

2005-03-15

2005-03-15

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S787000, C343S745000

Reexamination Certificate

active

06867745

ABSTRACT:
An AM radio antenna circuit having a ferrite bar loop antenna comprises a resonating structure forming a balanced antenna circuit, a varactor diode tuning structure presenting a controllable capacitance to said winding structure, a DC path including the winding structure coupled to the varactor constructed and arranged to deliver a tuning signal to the varactor, and means for connecting the antenna circuit to the input of an external detector integrated circuit.

REFERENCES:
patent: 3209358 (1965-09-01), Felsenheld
patent: 3679979 (1972-07-01), Krepps, Jr. et al.
patent: 4805232 (1989-02-01), Ma
patent: 6529169 (2003-03-01), Justice
patent: 0733916 (1995-12-01), None
patent: 56 027514 (1981-03-01), None
patent: 62 283705 (1988-05-01), None
patent: WO 0205236 (2002-01-01), None
patent: WO 0245210 (2002-06-01), None

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