| 摘要 |
Known is a radio communication device such as a GSM handset with receive-transmit antenna switching means such as a duplexer or a transmit receive switch. In GSM handsets it is highly desirable to save battery power as much as possible. To this end in the receive and transmit paths, the power supplied to components is switched off when functioning of such components is presently not needed. Proposed is a radio communication device in which the receive-transmit switch is a couple of electromechanical switches, preferably ultra-miniature Reed relays, of which the actuating coils are connected in series with at least one DC-supplied circuit of the receive path or transmit path.
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