Wireless communication device e.g. portable wireless telephone, has amplifier with switch that is moved to protection state when detachable antenna is improperly connected to amplifier

摘要

The device has a detachable antenna (12) connected to an amplifier (11). A switch (21) of the amplifier is moved to a protection state when the antenna is improperly connected to the amplifier. The switch connects the amplifier to a protection circuit when the antenna is improperly connected to the amplifier. A control unit limits the power of the amplifier.