Loop antenna and smartphone having the same

Abstract

A near field communication (NFC) antenna and a smartphone having the antenna are disclosed. The present disclosure provides a parallel stacked NFC antenna, of a smartphone, suitable for NFC communication. In addition, provided is a component arrangement structure capable of performing effective NFC communication by determining the location of the NFC antenna on the basis of the location of a slit arranged in a metal housing, and a battery.

1 - 46 . (canceled) 
     
     
         47 . A smartphone comprising:
 a housing; and   a loop antenna housed in the housing,   wherein the loop antenna comprises a plate-shaped magnetic core of a ferromagnetic material, a first antenna coil with a wire coiled multiple times in a loop shape, and a second antenna coil with a wire coiled multiple times in a loop shape,   wherein the magnetic core comprises a first surface, and a second surface opposite to the first surface,   wherein the first antenna coil is placed over the first surface of the magnetic core and the second antenna coil is placed over the second surface of the magnetic core, so that the magnetic core is disposed between the first antenna coil and the second antenna coil,   wherein the loop antenna is disposed such that the first surface of the magnetic core faces the rear cover so as to cause at least a part of the first antenna coil to be interposed between the magnetic core and the rear cover,   wherein the first antenna coil and the second antenna coil are coiled in loop shapes and connected in parallel to each other so that an electrical current flows in an identical direction, when viewed in a direction perpendicular to the backside of the smartphone.   
     
     
         48 . A loop antenna comprising:
 a plate-shaped magnetic core of a ferromagnetic material:   a first antenna coil with a wire coiled multiple times in a loop shape; and   a second antenna coil with a wire coiled multiple times in a loop shape,   wherein the magnetic core comprises a first surface, and a second surface opposite to the first surface,   wherein the first antenna coil is placed on the first surface of the magnetic core and the second antenna coil is placed on the second surface of the magnetic core, so that the magnetic core is disposed between the first antenna coil and the second antenna coil, and   wherein the first antenna coil and the second antenna coil are coiled in loop shapes and connected in parallel to each other so that an electrical current flows in an identical direction, when viewed in a direction perpendicular to the first surface.   
     
     
         49 . A method of performing wireless communication between a terminal device and a smartphone, the method comprising:
 providing the smartphone comprising a loop antenna; and   performing wireless communication between the smartphone and the terminal using the loop antenna,   wherein the loop antenna comprises: a plate-shaped magnetic core of a ferromagnetic material, a first antenna coil with a wire coiled multiple times in a loop shape; and a second antenna coil with a wire coiled multiple times in a loop shape,   wherein the magnetic core comprises a first surface, and a second surface opposite to the first surface,   wherein the first antenna coil is placed on the first surface of the magnetic core and the second antenna coil is placed on the second surface of the magnetic core, so that the magnetic core is disposed between the first antenna coil and the second antenna coil, and   wherein the first antenna coil and the second antenna coil are coiled in loop shapes and connected in parallel to each other so that an electrical current flows in an identical direction, when viewed in a direction perpendicular to the first surface.