Abstract: Disclosed are a magnetic sheet, a method of manufacturing the same and an antenna including the magnetic sheet. In the magnetic sheet manufactured by stacking a plurality of green sheets on top of each other and calcining the stacked plurality of green sheets, the plurality of green sheets are stacked after a different material layer is formed on a certain portion of both surfaces or one surface of at least one of the plurality of green sheets.

Abstract: Disclosed are a magnetic sheet, a method of manufacturing the same and an antenna including the magnetic sheet. In the magnetic sheet manufactured by stacking a plurality of green sheets on top of each other and calcining the stacked plurality of green sheets, the plurality of green sheets are stacked after a different material layer is formed on a certain portion of both surfaces or one surface of at least one of the plurality of green sheets.

Abstract: Disclosed herein is a method for manufacturing an electronic component comprising a ferrite by sintering. The method comprises the steps of: adding 3 wt% of ammonium alginate to a ferrite to form a mixture, and stirring the mixture while adding water thereto to form a gel; drying the gel at a temperature ranging from 85 ° C to 95 ° C to form a dried material; grinding the dried material to produce a ferrite powder coated with the ammonium alginate; subjecting the ferrite powder to compression molding; and sintering the compression-molded ferrite powder. According to the method, by adding ammonium alginate to the ferrite, the cohesion of the ferrite can be enhanced to facilitate the molding of the ferrite. Also, the magnetic loss tangent of the ferrite can be reduced and the permeability thereof can be increased, thus increasing the efficiency of the ferrite.

Abstract: Disclosed herein is a method for producing a spinel ferrite which has a low permeability loss and a low dielectric loss so that the spinel ferrite can be widely used as a material for high-frequency (MHz) electronic components, and a spinel ferrite produced thereby. The method for producing the spinel ferrite comprises the steps of: providing nickel oxide, cobalt oxide, manganese oxide and iron oxide; wet-mixing the nickel oxide, the cobalt oxide, the manganese oxide and the iron oxide in methanol to obtain a mixture; collecting powder from the mixture and drying the collected powder; grinding the dried powder; and heat-treating the dried powder, thereby producing a nickel-manganese-cobalt spinel ferrite having a low permeability loss and a low dielectric loss. The nickel-manganese-cobalt spinel ferrite can be widely as a material for RF electronic components, and when it is applied to an antenna, it can reduce the length of the antenna and improve the bandwidth, efficiency and performance of the antenna.