The invention claimed is:1. A back cover for a portable terminal formed of a metal material and disposed on a back surface of a portable terminal main body, comprising:a pattern portion which is formed to pass through the back cover formed of a metal material at a region corresponding to at least one antenna and configured to reduce generation of an eddy current;wherein the pattern portion includes:a through port formed to pass through the back cover at a predetermined area including the area corresponding to the at least one antenna;a mesh body formed of a metal material and disposed in the through port; anda protection layer filled in the through port and configured to connect the mesh body and the back cover.2. The back cover of claim 1, wherein the pattern portion is at least one pattern including at least one of a linear pattern and a through hole pattern.3. The back cover of claim 2, wherein the pattern portion includes the linear pattern and the through hole pattern, wherein the pattern portion close to each other are formed to be disconnected from each other.4. The back cover of claim 2, wherein each of the patterns includes a protection material filled therein.5. The back cover of claim 4, wherein the protection material is formed of a nonconductive and nonmagnetic material.6. The back cover of claim 1, wherein the mesh body includes a plurality of weft threads and a plurality of warp threads arranged to form a plurality of through holes,wherein the plurality of weft threads and the plurality of warp threads are electrically insulated from each other.7. The back cover of claim 1, wherein the back cover includes an accommodation groove recessed in an inner surface thereof,wherein the accommodation groove accommodates some or all of a thickness of the antenna.8. The back cover of claim 7, wherein the pattern portion is formed to pass through a bottom surface of the accommodation groove at a region corresponding to the at least one antenna.9. The back cover of claim 1, wherein the back cover is formed of a metal material including at least one of copper, aluminum, gold, and silver.10. The back cover of claim 1,wherein the plurality of weft threads and a plurality of warp threads each formed of a metal material are arranged to form a plurality of through holes.11. The back cover of claim 10, wherein the plurality of weft threads and the plurality of warp threads are electrically insulated from each other.12. The back cover of claim 10, wherein the protection layer is formed of a nonconductive and nonmagnetic material.13. A back cover-integrated antenna module comprising:a back cover for a portable terminal including a pattern portion;at least one antenna disposed in the back cover and operating at a predetermined frequency band; anda magnetic field shielding sheet disposed on one surface of the antenna to shield a magnetic field generated from the antenna so that the magnetic field is focused in a predetermined direction,wherein the pattern portion is formed to pass through the back cover at a region corresponding to at least one antenna and configured to reduce generation of an eddy current;wherein the pattern portion includes:a through port formed to pass through the back cover at a predetermined area including the area corresponding to the at least one antenna;a mesh body formed of a metal material and disposed in the through port; anda protection layer filled in the through port and configured to connect the mesh body and the back cover.14. The back cover-integrated antenna module of claim 13, wherein the at least one antenna is attached to an inner surface of the back cover through an adhesive member having nonconductivity.15. The back cover-integrated antenna module of claim 13, wherein the at least one antenna is any one of a WPT antenna, an MST antenna, and an NFC antenna or is a combo type including at least two antennas of a WPT antenna, an MST antenna, and an NFC antenna.16. The back cover-integrated antenna module of claim 13, wherein a heat-radiation sheet for heat radiation is stacked on one surface of the magnetic field shielding sheet.
