Emw Co., Ltd.

E.m.w. Energy Co., Ltd.

Pohang University of Science and Technology Foundation

Rekrix Co., Ltd.

Byung Hoon Ryou

Won Mo Sung

Jae Kyung Kong

Gi Ho Kim

Dong Ryul Shin

Bong Suk Choi

Jeong Keun Ji

Chang Hyun Park

Sang Hoon Park

Jeong Tae Kim

Jeong Pyo Kim

Seung Up Seo

Ha Sun Na

Kyung Duk Jang

Myo Guen Yang

Dong Suk Lee

Jeong Keun Jl

Wee Sang Park

Young Soo Jang

You Ho Kim

An air-metal secondary battery module includes one or more metal-air secondary battery units, each of which has a water intake part for taking an aqueous solution therein and a gas outlet port for discharging gas generated during charging; an aqueous solution storage unit which stores the aqueous solution; an aqueous solution supply unit which connects the one or more water intake parts to the aqueous solution storage unit; and a gas discharge unit which is connected to the one or more gas outlet ports to discharge the gas discharged from the gas outlet ports to the outside.

Air-metal secondary battery unit and air-metal secondary battery module including same

A metal-air cell recharge apparatus, a metal-air cell assembly and a metal-air cell recharge system including the same are provided. The metal-air cell recharge apparatus for recharging a metal-air cell assembly including a secondary metal-air cell containing anode gel and a case accommodating the secondary metal-air cell therein, the apparatus includes a recharge unit for generating supply power using an external power source, and supplying the metal-air cell assembly with the supply power; and a humidified-air supply unit for generating humidified air containing a certain amount of moisture and supplying the humidified air inside the case through a humidified-air supply hole connected to the metal-air cell assembly.

Metal air cell charging apparatus, metal-air cell assembly, and metal-air cell charging system comprising the same

There is provided an antenna having a spiral-shaped loading formed on the ground plane, in which a resonant frequency is lowered as the reactance component of a CRLH-TL structure is adjusted.

CRLH-TL meta material antenna

The present invention relates to an inorganic ion conductive membrane, which is capable of obtaining a fuel cell with a stable operation in all temperature, high performance, and no leakage of fuels by manufacturing the inorganic ion conductive membrane, composed of an inorganic membrane, using an anodic oxidization reaction and applying the manufactured inorganic ion conductive membrane to the fuel cell, a fuel cell including the inorganic ion conductive membrane, and a method of manufacturing the inorganic ion conductive membrane and the fuel cell. The method of manufacturing the inorganic ion conductive membrane includes the steps of (a) disposing a conductive wire, made of the same materials as a metal tube, within the metal tube, supplying an anode current to the conductive wire, and supplying a cathode current to the metal tube and (b) applying an electrolyte to the metal tube and the conductive wire, thereby forming an inorganic membrane comprising a plurality of pores in at least some of an inside wall and outside wall of the metal tube to which the cathode current has been supplied.

Inorganic conductive membrane, fuel cell containing the same, and method for manufacturing thereof

There is herein disclosed an interdigital capacitor, an inductor, and an LH transmission line and a coupler using the interdigital capacitor and the inductor. The interdigital capacitor comprises two finger sets which are substantially disposed in parallel with each other. Fingers of each finger set are overlapped at outer edges thereof with each other to thereby generate capacitance. The inductor is formed substantially spirally inside the transmission line, so that it can have a large inductance in a compact shape and can be used in a broad frequency band. The LH transmission line has a broad frequency band in a compact shape, which includes interdigital capacitors connected in series with each other and inductors connected in parallel with each other. In addition, the coupler employing the LH transmission line has an excellent couplability.

Transmission line with left-hand characteristics including an interdigital capacitor with partially overlapping fingers

There is provided an antenna implementing a first 0-th order resonant frequency using a first radiator to which power is fed through parallel inductors of helical structures, and implementing a second 0-th order resonant frequency using a second radiator to which power is couple-fed through radiation elements put into the helical structures.

Meta material antenna using coupling in helical structure

Disclosed are a ferrite for high-frequency applications and a manufacturing method thereof. The ferrite comprises the elements Mg, Cu, Fe, and O, in which the elements have a composition ratio represented by the formula MgCuFeO, wherein x has a value of 0.1 or less.

Ferrite for high-frequency applications and manufacturing method thereof

The present invention relates to an antenna using a complex structure in which dielectric substances having a low dielectric constant and magnetic substances having a high magnetic permeability are arranged vertically and periodically in order to improve the gain, efficiency, and bandwidth of the antenna while maintaining a small size which is an advantage of a conventional antenna using dielectric substances having a high dielectric constant. The present invention provides the antenna using a complex structure having a vertical and periodic structure of dielectric substances and magnetic substances, comprising a substrate and a radiation patch formed on the substrate. The substrate includes a plurality of layers. Each of the layers has the dielectric substances and the magnetic substances of a bar shape alternately arranged therein and has the dielectric substances and the magnetic substances alternately laminated thereon even in a height direction.

Antenna using complex structure having periodic, vertical spacing between dielectric and magnetic substances

The invention relates to the size reduction of an antenna using a magneto-dielectric material for a CRLH-TL (Composite Right/Left Handed Transmission Line) antenna. In particular, the invention provides a small and low profile metamaterial antenna attained by performing SRR (Split Ring Resonator) magnetization on a dielectric material and applying the magneto-dielectric material to the CRLH-TL antenna that is composed of patches and vias. Even further, the invention provides a metamaterial antenna using a magneto-dielectric material, the antenna comprising: a substrate which is made up of a magneto-dielectric material and which has an SRR structure inserted thereto; patches with a CRLH-TL structure formed at a predetermined distance above the substrate; and a ground plane formed at a predetermined distance below the substrate.

Metamaterial antenna using a magneto-dielectric material

Provided are an RFID operating system and an RFID system operating method for allowing multiple RFID readers to read tags without collision. The RFID system operating method includes the steps of grouping RFID readers spaced apart by more than a spacing distance capable of avoiding collision between RFID readers into a single group to determine at least one group, classifying RPM readers included in each group into at least one sub-group based on a read time of each RFID reader, and driving the RFID readers such that RPM readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate. According to the present invention, switching is performed sub-group by sub-group to reduce the number of switching operations and sub-groups can simultaneously operate to decrease a read time.

System and method for allowing multiple RFID reader devices to read RFID tags without collision

Disclosed herein is a cylindrical zinc-air cell and fabricating method thereof. The zinc-air cell comprises a film including an air anode membrane and a separator, the film being formed in a substantially cylindrical bent shape; and a junction element adapted to receive both ends of the film therein. The junction element is at least partly deformed to pressurize the both ends of the film so as to be joined to the film. By doing so, leakage of the zinc gel can be easily prevented in the fabrication of the cylindrical zinc-air cell, thereby extending the application area of the zinc-air cell.

Cylinder type zinc-air cell and method for producing the same

The present invention relates to a transmission line in which a physical value of an inductive element can be changed in various ways while minimizing a size. The transmission line of the present invention includes a transmission unit, a ground unit and inductive elements. The inductive element connects the transmission unit and the ground unit, and has a predetermined pattern. The inductive element is provided between two surfaces of a substrate. According to the present invention, a physical value of the inductive element, in particular, an inductance value can be changed in various ways while not increasing an overall size. Accordingly, a transmission line can be designed freely according to its application.

Transmission line with left-hand characteristics including a spiral inductive element

Disclosed is an antenna-speaker assembly, including an antenna unit including a radiator, a speaker unit including a speaker and coupled to the antenna unit, and a sound-absorbing part formed to conform to a circumference of a coupling surface of the antenna unit and the speaker unit, the sound-absorbing part being interposed between the antenna unit and the speaker unit. According to the present invention, the antenna-speaker assembly equipped with the structure of generating clear sound is provided. Furthermore, in a wireless communication device including an antenna-speaker assembly, the antenna-speaker assembly include an antenna unit including a radiator, a speaker unit including a speaker and coupled to the antenna unit, and a sound-absorbing material formed on a circumference of a face where the antenna unit and the speaker unit are coupled in such a manner as to be interposed between the antenna unit and the speaker unit.

Antenna and speaker assembly and wireless communication device

The present invention provides a multiple band antenna, including a first radiation element adapted to resonate at a first resonant frequency band by employing a resonant length, which is reduced by a coupling effect with a neighboring radiation element, a power feed unit coupled to one lower side of the first radiation element, a first inductor coupled in series to the other lower side of the first radiation element, a second radiation element adapted to face the first radiator to thereby obtain the coupling effect, wherein the second radiation element has a predetermined lower portion coupled to the first inductor, a second inductor having one end coupled in series to a predetermined upper portion of the second radiation element, and a third radiation element coupled to the other end of the second inductor, wherein the third radiation element operates as one radiation element together with the second radiation element and resonates at a second frequency band.

Multiple band antenna

The present invention relates to A radio frequency (RF) switch and an apparatus including the RF switch. In an aspect of the present invention, an RF switch includes a transmission line having one end connected to an input terminal or an output terminal and the other end connected to a signal line and configured to transfer an RF signal, and a diode disposed between the input terminal and the transmission line or between the output terminal and the transmission line, the diode being configured to control whether or not to transmit the RF signal. In another aspect, an RF switch includes a transmission line having one end connected to an input terminal and the other end connected to an output terminal, and a diode disposed between the input terminal and the transmission line or between the output terminal and the transmission line, the diode being configured to control whether or not to transmit the RF signal. Here, a CRLH (Composite Right/Left-Handed) transmission line is employed as the transmission line.

Growing community of inventors

Seoul, South Korea

Byung Hoon Ryou