MULTIBAND BUILT-IN ANTENN FOR PORTABLE TERMINAL

摘要

PURPOSE: A multiband built-in antenna for a portable terminal is provided to implement optimum radiation efficiency in different bands through simple switching. CONSTITUTION: A multiband built-in antenna for a portable terminal comprises: a feeding unit(11) which is electrically connected to the RF connector of a terminal main board; an antenna radiation, having two ground units(12,13), which is electrically connected to the ground unit of the terminal; and switch unit which is connected to the ground line of each ground of the antenna radiation unit and selectively connects at least one of two ground part to the ground unit.