an antenna apparatus for a mobile communication terminal to achieve better portability and to prevent damage from careless handling by a user . the antenna is installed inside a main body of the mobile terminal , to render more room for accommodating its components . the antenna apparatus includes the main body having therein a main board , a keypad assembly provided with a plurality of key tops formed exposedly on the upper surface of the main body , and an antenna section disposed , between the main board and the keypad assembly , opposite to and in the vicinity of the lower end of the main body . the antenna section is comprised of an antenna sheet disposed underneath the keypad assembly .