Portable communication device with optimized transmission loss

Details Portable communication device with optimized transmission loss Portable communication device with optimized transmission loss

1997-03-12

1999-11-23

Bost, Dwayne D.

Telecommunications

Transmitter

Including tuning

455 90, 455269, 455575, 343860, 343702, H01Q 1112

Patent

active

059916087

ABSTRACT:
A portable electronic apparatus is disclosed having an antenna and a communication circuit. The antenna impedance is chosen to be a predetermined value which is deliberately mismatched to the impedance of the communication for a predetermined frequency band. This mismatch is chosen to optimize the signal loss between the antenna and the communication circuit when the antenna is far and near a disturbing source. The imaginary part of the antenna impedance has a sign opposite to the sign of the circuit impedance when the antenna is a predetermined distance from the disturbing source.

REFERENCES:
patent: 5337061 (1994-08-01), Pye et al.
patent: 5493311 (1996-02-01), Itoh et al.
patent: 5535435 (1996-07-01), Balzano et al.
patent: 5561437 (1996-10-01), Phillips et al.
patent: 5659889 (1997-08-01), Cockson

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