Mobile telecommunication apparatus

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/32 (2006.01) H01Q 1/24 (2006.01) H01Q 13/10 (2006.01) H01Q 19/00 (2006.01) H01Q 21/28 (2006.01) H04B 1/38 (2006.01) H05K 1/02 (2006.01) H05K 1/14 (2006.01)

Patent

CA 2246925

A mobile telecommunication apparatus reduces current around a control circuit on a printed circuit board so as to lessen background noise and to improve the radiation characteristics. The mobile telecommunication apparatus includes a printed circuit board located in a body of the mobile telecommunication apparatus; a radio circuit including a modulator circuit and a demodulator circuit arranged on the printed circuit board; a control circuit including a voice circuit for processing a voice signal arranged on the printed circuit board; a first earth conductor for grounding the radio circuit; a second earth conductor for grounding the control circuit and being continuous with the first earth conductor; an antenna connected to the radio circuit; and a slit arranged between the first earth conductor and the second earth conductor.

Appareil de télécommunication mobile, réduisant le courant du circuit de commande sur une carte imprimée de manière à amoindrir le bruit de fond et à améliorer les caractéristiques de rayonnement. Comprend une carte imprimée, logée dans le corps de l'appareil; un circuit de radiocommunication comprenant un circuit modulateur et un circuit démodulateur montés sur la carte; un circuit de commande comprenant un circuit de traitement d'un signal vocal, monté sur la carte; un premier conducteur de terre pour mettre à la terre le circuit de radiocommunication; un deuxième conducteur de terre pour mettre à la terre le circuit de commande et assure la continuité avec le premier conducteur de terre; une antenne connectée au circuit de radiocommunication; et une fente séparant le premier conducteur de terre et le deuxième conducteur de terre.

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