Telecommunications – Transmitter – With variation of antenna impedance or dimension for modulation
Reexamination Certificate
2005-10-18
2005-10-18
Trost, William (Department: 2683)
Telecommunications
Transmitter
With variation of antenna impedance or dimension for modulation
C455S063100, C455S300000, C455S301000, C455S575500, C343S841000
Reexamination Certificate
active
06957051
ABSTRACT:
An apparatus and method for shielding an operator from electromagnetic fields emitted from an antenna in a portable communication device. A plurality of active shields are placed between the operator's earpiece and the antenna to dampen the effects of the electromagentic fields. The active shields are coupled to adjustment circuits which may include variable gain amplifiers and phase couplers to offset the antenna signal.
REFERENCES:
patent: 5697083 (1997-12-01), Sano
patent: 5819162 (1998-10-01), Spann et al.
patent: 5826201 (1998-10-01), Gratias
patent: 5907307 (1999-05-01), Bickert et al.
patent: 5995854 (1999-11-01), Wilson
patent: 6009311 (1999-12-01), Killion
patent: 6211671 (2001-04-01), Shattil
patent: 6314277 (2001-11-01), Hsu
patent: 6356773 (2002-03-01), Rinot
patent: 6359216 (2002-03-01), Liu
patent: 6369772 (2002-04-01), Forster
patent: 6564038 (2003-05-01), Bethea et al.
patent: 6597896 (2003-07-01), Faessler
patent: 6615026 (2003-09-01), Wong
patent: 6681125 (2004-01-01), Woo
Korisch Ilya A.
Sumetsky Michael
Avaya Technology Corp.
Cohen & Pontani, Lieberman & Pavane
Miller Brandon J.
Trost William
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