Cover of a mobile device and mobile device including the same

Abstract

A cover of a mobile device includes a metal structure disposed to cover one surface of the mobile device. The metal structure includes a metal material, and operates as an antenna for a wireless communication of the mobile device.

What is claimed is: 
     
         1 . A cover of a mobile device, comprising:
 a metal structure configured to cover one surface of the mobile device, the metal structure including a metal material, and configured to operate as an antenna for a wireless communication of the mobile device.   
     
     
         2 . The cover of  claim 1 , wherein the metal structure includes a metal plate region having a shape of a split ring resonator (SPR). 
     
     
         3 . The cover of  claim 1 , wherein the metal structure includes:
 a metal plate including the metal material, the metal plate configured to cover the one surface of the mobile device;   an opening formed at the metal plate;   a slit extending from the opening, the slit having a width narrower than a width of the opening; and   two terminals on the metal plate such that the slit is located between the two terminals.   
     
     
         4 . The cover of  claim 3 , wherein a signal path from one of the two terminals to the other of the two terminals is formed at a region of the metal plate surrounding the opening. 
     
     
         5 . The cover of  claim 4 , wherein the metal structure further includes:
 an insulator around at least a portion of the region of the metal plate, the region at which the signal path is formed.   
     
     
         6 . The cover of  claim 3 , wherein the opening has a triangular shape, a rectangular shape, a polygonal shape having five or more sides, a circular shape or an elliptical shape. 
     
     
         7 . The cover of  claim 3 , wherein the metal structure further includes:
 a capacitor at the slit.   
     
     
         8 . The cover of  claim 7 , wherein the metal structure operates as a resonator having a resonance frequency for the wireless communication. 
     
     
         9 . The cover of  claim 7 , wherein the capacitor is formed by portions of the metal plate at both sides of the slit and an insulator in the slit. 
     
     
         10 . The cover of  claim 3 , wherein the two terminals are coupled to a capacitor included in a matching circuit of the mobile device, and the metal structure and the capacitor included in the matching circuit operate as a resonator having a resonance frequency for the wireless communication. 
     
     
         11 . The cover of  claim 3 , wherein the metal structure further includes:
 a magnetic sheet on at least a portion of the metal plate.   
     
     
         12 . The cover of  claim 1 , wherein the metal structure includes:
 a metal plate including the metal material, the metal plate configured to cover the one surface of the mobile device;   an opening formed at the metal plate; and   two terminals on the metal plate such that the opening is located between the two terminals.   
     
     
         13 . The cover of  claim 1 , wherein the metal structure includes:
 a metal plate including the metal material, the metal plate configured to cover the one surface of the mobile device;   a first opening formed at the metal plate;   a second opening formed at the metal plate, the second opening being spaced apart from the first opening; and   two terminals on the metal plate such that the first and second openings are located between the two terminals.   
     
     
         14 . The cover of  claim 1 , wherein the metal structure is configured to operate as the antenna for a near field communication (NFC). 
     
     
         15 . A mobile device comprising:
 a wireless communication chip configured to perform a wireless communication;   a matching circuit coupled to the wireless communication chip, the matching circuit configured to perform impedance matching between the wireless communication chip and an antenna for the wireless communication; and   a cover of the mobile device configured to cover at least one surface of the mobile device, and coupled to the matching circuit, the cover including a metal material, and configured to operate as the antenna for the wireless communication.   
     
     
         16 . A cover of a mobile device, comprising:
 a cover configured to cover at least one surface of the mobile device and operate as an antenna for a wireless communication of the mobile device, the cover formed of a metal material and including a metal plate region, the metal plate region including an opening, at least one slit and at least two terminals, the slit extending from a side of the opening, and the two terminals configured to be connected to a matching circuit of the mobile device.   
     
     
         17 . The cover of  claim 16 , further comprising:
 a magnetic sheet covering at least a portion of the metal plate region.   
     
     
         18 . The cover of  claim 16 , further comprising:
 an insulator at the slit, wherein,   the insulator and the two terminals forms a capacitor, and   the capacitor and the metal plate region serving as an inductor are configured to operate as a resonator having an LC resonance frequency.   
     
     
         19 . The cover of  claim 16 , wherein
 an insulator around at least a portion of the metal plate region and configured to shield a signal path formed at the metal plate from a noise from an outside of the signal path.   
     
     
         20 . The cover of  claim 16 , further comprising:
 an insulator at the slit and around at least a portion of the metal plate region, a first portion of the insulator at the slit and the two terminals forming a capacitor, a second portion of the insulator configured to shield a signal path formed at the metal plate from a noise from an outside of the signal path.