Patent ID: 9136600
Filing Date: 2015-09-15
Classification: H01Q

Abstract:
1. An antenna comprising an antenna coil and an electrically conductive planar metal plate having a first end and a second end opposing the first end, the antenna coil including a magnetic-material core having a first main face and a second main face and a coil conductor of the antenna coil wound around the magnetic-material core, the antenna coil being positioned closely to the electrically conductive planar metal plate, wherein external dimensions of the electrically conductive planar metal plate are larger than external dimensions of planar shape of the antenna coil when viewed in plan view, the first main face of the magnetic-material core opposes the electrically conductive planar metal plate, wherein the antenna coil is provided on a surface of the electrically conductive planar metal plate and is positioned closer to the first end than to the second end of the electrically conductive planar metal plate such that the entire antenna coil is positioned on one side of a midpoint between the first end and the second end of the electrically conductive planar metal plate, wherein, of the coil conductor of the antenna coil, a first conductor part of the antenna coil includes plural first winding portions of the coil conductor within an area of the first main face of the magnetic-material core, and a second conductor part includes plural second winding portions of the coil conductor within an area of the second main face of the magnetic-material core in view from line in a direction normal to the second main face of the magnetic-material core, the second conductor part is provided in a position nearer to the first end of the electrically conductive planar metal plate than the first conductor part is, and wherein the coil conductor of the antenna coil is a spiral shape conductor formed on a flexible substrate, said flexible substrate having a through hole provided through a central part of the flexible substrate where the coil conductor of the antenna coil is formed, said through hole surrounded by the spiral shape conductor, and the magnetic-material core is inserted into the through hole.