Combined dipole and ferrite antenna

Details Combined dipole and ferrite antenna Combined dipole and ferrite antenna

1981-06-25

1983-09-27

Lieberman, Eli

Communications: radio wave antennas

Antennas

Plural separate diverse type

343788, H01Q 708, H01Q 2129

Patent

active

044070004

ABSTRACT:
A small sized reception antenna for VHF and/or UHF band for the use in a room has been found. The antenna has a horizontal dipole type first antenna portion having a folded elongated conductor, and a vertical second antenna portion having a ferrite pole electromagnetically coupled with said horizontal first antenna portion. Said horizontal first antenna portion is rotatable in a horizontal plane, while the second antenna portion is fixed vertically. A tank circuit with a tank coil wound on the ferrite pole and a variable capacitor is provided to resonate the antenna with the reception frequency. An output coil is wound on the ferrite pole, and said output coil provides the output signal of the present antenna. Means for sliding the output coil along the ferrite pole is provided to adjust the output impedance of the present antenna for each of the reception frequencies.

REFERENCES:
patent: 2581348 (1952-01-01), Bailey

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