Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
Patent
1996-12-27
1999-11-16
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
Having particular housing or support of a transceiver
455575, 343702, H04B 138
Patent
active
059873116
ABSTRACT:
An antenna switch is provided on a portable telecommunication instrument, such as a cellular telephone, to enable operation of the keypad of the instrument when the antenna is extended. In one arrangement, an antenna switch comprises a pair of antenna position sensing contacts disposed on a printed circuit board at a position where electrical continuity is established between the contacts by an electrically conductive member on the antenna when the antenna is in an extended position. The present invention solves the problem of inadvertent activation of the instrument when the antenna is retracted. Thus, the instrument does not require a closeable cover over the keypad to prevent inadvertent actuation of the instrument.
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PCT/US97/24173 International Search Report.
Eisenzopf Reinhard J.
Ericsson Inc.
Nguyen Duc
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