Abstract: A positive electrode active material for a sodium secondary battery includes a sodium composite transition metal oxide represented by Formula 1 and having a P3 crystal structure, and a positive electrode and a sodium secondary battery which include the positive electrode active material. Nax[LiaM1-a]O2??[Formula 1] wherein M is at least one transition metal, 0.64?x?0.7, and 0.01?a?0.1.

Abstract: An antenna module disposed inside a conductive cover and performing near field communications includes: a wiring portion having antenna wirings formed on an insulating substrate and having a first surface facing an inner surface of the conductive cover and a second surface opposing the first surface; a first magnetic portion disposed between the first surface of the wiring portion and the conductive cover; and a second magnetic portion disposed on the second surface of the wiring portion, wherein the first magnetic portion and the second magnetic portion are disposed to partially overlap each other or to have edges thereof in vertical correspondence with each other.

Abstract: A coil module including a magnetic body having a first body portion extended in a first axial direction and a second body portion extended in a second axial direction different from the first axial direction; and a transmitting coil including a first coil wound around a portion of the first body portion and a second coil wound around a portion of the second body portion.

Abstract: An information transmitter includes a transmitting coil configured to receive a coil voltage to generate a magnetic field; and a signal generator configured to receive a direct current (DC) voltage and operating switches to apply the coil voltage to the transmitting coil, for a first time constant in a first current path, wherein the coil voltage includes a first value, and for a second time constant in a second current path, wherein the coil voltage includes a second value smaller than the first value, and wherein the first time constant and second time constant are different from each other.

Abstract: A coil device includes a board, a first pattern formed on one surface of the board, and a second pattern formed on the other surface of the board. At least one pattern via electrically connects the first pattern and the second pattern to each other. A via region, corresponding to a region in which the pattern via is formed in the first pattern, includes n first conducting wires (where n is a natural number of 1 or more). At least a portion of the first pattern, excluding the via region in the first pattern, includes m first conducting wires (where m is greater than n and is a natural number of 2 or more).

Abstract: An antenna module includes a wiring part including a second antenna wiring disposed to have a spiral shape on an insulating substrate and a first antenna wiring disposed in an internal region of the second antenna wiring and disposed in a solenoid structure; a first magnetic part disposed to be inserted into the center of the solenoid structure and having at least a portion exposed externally from the wiring part; and a second magnetic part coupled to the first magnetic part.

Abstract: An antenna module includes a coil part including a second antenna wiring disposed in a spiral shape on an insulating substrate and a first antenna wiring disposed in an internal region of the second antenna wiring; and a magnetic part including a second magnetic part disposed on a second surface of the insulating substrate and a first magnetic part extending from the second magnetic part, penetrating through the internal region of the second antenna wiring, and disposed on a first surface of the insulating substrate.

Abstract: An antenna module includes a coil part including a second antenna wiring formed on an insulating substrate in a spiral shape and a first antenna wiring disposed in an internal region of the second antenna wiring, and a magnetic part including a first magnetic part disposed in the internal region of a first surface of the insulating substrate and a second magnetic part disposed on a second surface of the insulating substrate.

Abstract: A wireless communication antenna comprises a magnetic body and coil portions. The coil portions have a solenoid shape formed around the magnetic body defining a core. The coil portions are spaced apart from each other and connected to each other in series. Magnetic fields radiated by the coil portions overlap each other and each of the coil portions comprises: a first wiring portion disposed on a first surface of the magnetic body; a second wiring portion disposed on a second surface of the magnetic body; and conductive vias interconnecting the first wiring portion and the second wiring portion.

Abstract: An antenna module includes an insulating substrate; a first antenna wiring including a first spiral wiring disposed on the insulating substrate and having a first portion disposed adjacent to an edge of the insulating substrate, and a second spiral wiring disposed on the insulating substrate and spaced apart from the first spiral wiring; and a magnetic part disposed on one surface of the insulating substrate and disposed to overlap a second portion of the first spiral wiring that is adjacent to the second spiral wiring without overlapping the first portion of the first spiral wiring.

Abstract: A method includes preserving a meat product with propionic acid, the method including contacting meat with exogenous enzymes, maintaining the meat-enzyme mixture for a sufficient period and at a sufficient temperature for the enzyme to react with one or more meat substrates and produce propionic acid, and heating the meat-enzyme mixture for a sufficient period and at a sufficient temperature to inactivate the enzymes and cook the meat.

Abstract: An antenna module includes a coil part including a second antenna wiring disposed in a spiral shape on an insulating substrate and a first antenna wiring disposed in an internal region of the second antenna wiring; and a magnetic part including a second magnetic part disposed on a second surface of the insulating substrate and a first magnetic part extending from the second magnetic part, penetrating through the internal region of the second antenna wiring, and disposed on a first surface of the insulating substrate.

Abstract: An antenna module includes a wiring part including a second antenna wiring disposed to have a spiral shape on an insulating substrate and a first antenna wiring disposed in an internal region of the second antenna wiring and disposed in a solenoid structure; a first magnetic part disposed to be inserted into the center of the solenoid structure and having at least a portion exposed externally from the wiring part; and a second magnetic part coupled to the first magnetic part.

Abstract: An antenna module disposed inside a conductive cover and performing near field communications includes: a wiring portion having antenna wirings formed on an insulating substrate and having a first surface facing an inner surface of the conductive cover and a second surface opposing the first surface; a first magnetic portion disposed between the first surface of the wiring portion and the conductive cover; and a second magnetic portion disposed on the second surface of the wiring portion, wherein the first magnetic portion and the second magnetic portion are disposed to partially overlap each other or to have edges thereof in vertical correspondence with each other.

Abstract: An antenna module includes a coil part including a second antenna wiring formed on an insulating substrate in a spiral shape and a first antenna wiring disposed in an internal region of the second antenna wiring, and a magnetic part including a first magnetic part disposed in the internal region of a first surface of the insulating substrate and a second magnetic part disposed on a second surface of the insulating substrate.

Abstract: A coil module including a magnetic body having a first body portion extended in a first axial direction and a second body portion extended in a second axial direction different from the first axial direction; and a transmitting coil including a first coil wound around a portion of the first body portion and a second coil wound around a portion of the second body portion.

Abstract: An antenna module includes: a coil part including an antenna wiring disposed on an insulating substrate; a first magnetic part disposed on a first surface of the insulating substrate; and a second magnetic part disposed on a second surface of the insulating substrate, wherein the first magnetic part and the second magnetic part overlap with each other on a center region of the antenna wiring.

Abstract: An information transmitter includes a transmitting coil configured to receive a coil voltage to generate a magnetic field; and a signal generator configured to receive a direct current (DC) voltage and operating switches to apply the coil voltage to the transmitting coil, for a first time constant in a first current path, wherein the coil voltage includes a first value, and for a second time constant in a second current path, wherein the coil voltage includes a second value smaller than the first value, and wherein the first time constant and second time constant are different from each other.

Abstract: A wireless communication antenna comprises a magnetic body and coil portions. The coil portions have a solenoid shape formed around the magnetic body defining a core. The coil portions are spaced apart from each other and connected to each other in series. Magnetic fields radiated by the coil portions overlap each other and each of the coil portions comprises: a first wiring portion disposed on a first surface of the magnetic body; a second wiring portion disposed on a second surface of the magnetic body; and conductive vias interconnecting the first wiring portion and the second wiring portion.

Abstract: A coil device includes a board, a first pattern formed on one surface of the board, and a second pattern formed on the other surface of the board. At least one pattern via electrically connects the first pattern and the second pattern to each other. A via region, corresponding to a region in which the pattern via is formed in the first pattern, includes n first conducting wires (where n is a natural number of 1 or more). At least a portion of the first pattern, excluding the via region in the first pattern, includes m first conducting wires (where m is greater than n and is a natural number of 2 or more).