Earphone antenna, composite coil and coaxial cable used...

Details Earphone antenna, composite coil and coaxial cable used... Earphone antenna, composite coil and coaxial cable used...

2007-06-26

2007-06-26

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Body-attached or connected

C343S702000, C455S569100, C455S575100

Reexamination Certificate

active

10546449

ABSTRACT:
An earphone antenna in which a balun is connected to one side and the other side having an audio/high-frequency dual-function signal connecting the earphone unit via a loading coil and wireless equipment connected to the balun, the loading coil selecting low impedance for fundamental frequency and selecting to obtain high impedance for higher frequencies, in order to integrate earphone and antenna.

REFERENCES:
patent: 4044303 (1977-08-01), Reindel
patent: 5945963 (1999-08-01), Leisten
patent: 2005/0245289 (2005-11-01), Yoshino
patent: 59-108348 (1984-07-01), None
patent: 06-022331 (1994-01-01), None
patent: 06-088015 (1994-03-01), None
patent: 10-056325 (1998-02-01), None
patent: 10-084209 (1998-03-01), None
patent: 11-317309 (1999-11-01), None
International Search Report mailed Aug. 17, 2004.

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