Portable telephone and method for automatically switching an antenna mode thereof

摘要

A portable telephone with an extendible antenna automatically switches an antenna mode according to a received signal strength. The method for automatically switching the antenna mode comprises the steps of measuring the received signal strength during a call in an internal antenna mode where the antenna is retracted; comparing the measured signal strength with a threshold value; and switching the antenna mode to an external antenna mode by extending the antenna when the measured signal strength is lower than the threshold value. <IMAGE>