INTERNAL ANTENNA FOR LOW FREQUENCY BAND

摘要

A built-in antenna is provided to reduce a size of a mobile communication terminal by improving the degree of freedom in a component installation structure in the mobile communication terminal. A built-in antenna for a low frequency band includes an antenna element(300) and a flexible circuit board(400). An antenna element has a polyhedral block, a first radiant pattern, and a coupling pattern. The first radiant pattern is formed along an outer circumference of the polyhedral block in a winding form. The coupling pattern couples the flow of the current inputted to the first radiant pattern. The flexible printed circuit is connected to the polyhedral block. A second radiant pattern(430) is formed in the flexible printed circuit board. A second radiant pattern includes a connection unit and a radiant part. The connection unit is connected to the first radiant pattern. The radiant part is formed in the outside of the polyhedral block area.