Abstract: Disclosed is a frequency-division duplexing (FDD) type antenna device for implementing spatial-polarization separation of beams using a quad-polarized antenna module array. There is provided an antenna device including first radiating elements, second radiating elements, third radiating elements, and fourth radiating elements, a filter unit including first, second, third, and fourth filters that filter signals of first, second, third, and fourth signal paths, respectively, and a phase setting module configured to set phases of the filtered signals so that a first beam and a second beam radiated through the first and second radiating elements and the third and fourth radiating elements, respectively, are separated in space, wherein the first beam and the second beam have different polarization directions.

Abstract: The present invention relates to a full analog phase shifter and an antenna apparatus including same, and more particularly, comprises: a variable switch panel including a first conductive pattern terminal and a second conductive pattern terminal; and an antenna element substrate on which a plurality of array antenna elements are arranged and a transmission line being in contact with the first conductive pattern terminal and the second conductive pattern terminal is pattern-printed, wherein, due to a phase shift caused by contact points of the transmission line with respect to the first conductive pattern terminal and the second conductive pattern terminal, phases of the plurality of antenna elements are linearly array distributed on a same reference phase plane, thereby providing an advantage of easily implementing a mirror symmetry structure having a linear phase distribution only by a phase shift in an RF stage without phase conversion in a digital stage.

Abstract: A coil component includes a body having a recess formed therein, a support member disposed within the body, a coil disposed on the support member, and an external electrode disposed on one surface of the body, the external electrode extending to the recess to be connected to the coil. The external electrode includes a first metal layer disposed on the recess to be in contact with the coil, and a conductive resin layer having at least a portion in contact with the first metal layer.

Abstract: A coil component includes a body having a first surface and a second surface opposing each other in a first direction and respectively having a recess formed therein, and a third surface and a fourth surface connecting the first surface and the second surface and opposing each other in a second direction, a coil including a coil portion disposed within the body and having a plurality of turns, a first lead-out portion disposed within the body and extending to the recess of the first surface of the body, and a second lead-out portion having at least a portion extending from an outermost turn of the coil portion to the recess of the second surface of the body, and first and second external electrodes disposed on the third surface of the body and extending to the recess to be connected to the first and second lead-out portions, respectively.

Abstract: A quadruple polarization antenna apparatus comprising: first dual-polarization antenna element; a second dual-polarization antenna element disposed below the first dual-polarization antenna element so that at least a portion overlaps the first dual-polarization antenna element; and a connecting part configured to connect the first dual-polarization antenna element and the second dual-polarization antenna element.

Abstract: A heat storage body for a regenerative catalytic apparatus is provided, the heat storage body includes: a body unit including a ceramic sintered body containing aluminum oxide, silica, and magnesium oxide, the body unit having a plurality of channels connecting first and second surfaces, located opposite to each other. The heat storage body further including a protective film disposed on a surface of the body unit and inner surfaces of the plurality of channels. The protective film includes an oxide containing a first metal of aluminum and at least one second metal including at least one from among yttrium, zinc, zirconium, tungsten, zinc, and nickel.

Abstract: The present invention provides a method for the production of oligosaccharides by the fermentation of dextransucrase-producing microorganisms with sucrose and maltose. The disclosed process allows for the control of the final composition of the isomaltooligosaccharides by adjustments to pH and the initial ratio of sucrose to maltose.

Abstract: A catalyst for decomposing perfluorinated compounds is composed of tungsten (W) compound and nickel (Ni) compound as main components and composed of aluminum (Al) compound or silicon (Si) compound as a supporter.

Abstract: The present invention provides a method for the production of oligosaccharides by the fermentation of dextran-sucrase-producing microorganisms with sucrose and maltose. The disclosed process allows for the control of the final composition of the isomaltooligosaccharides by adjustments to pH and the initial ratio of sucrose to maltose.

Abstract: A catalyst for decomposing perfluorinated compounds is composed of tungsten (W) and nickel (Ni) as main components and composed of aluminum (Al) or silicon (Si) as a supporter.

Abstract: The present invention provides a method for the production of oligosaccharides by the fermentation of dextran-sucrase-producing microorganisms with sucrose and maltose. The disclosed process allows for the control of the final composition of the isomaltooligosaccharides by adjustments to pH and the initial ratio of sucrose to maltose.

Abstract: Disclosed herein are an intelligent system and method for monitoring a generator reactive power limit using machine model parameters. The intelligent system and method for monitoring a generator reactive power limit using machine model parameters can calculate a maximum reactive power limit corresponding to over-excitation and a generator terminal voltage corresponding to under-excitation, estimate a correct field current even when system variable are changed, and monitor the generator reactive power limit by using machine model parameters and a one-machine infinite bus, to thereby supply a maximum or minimum reactive power to a power system within an allowable generator reactive power limit and prevent a generator trip caused by the reactive power limit and a power failure over a wide area.

Abstract: Disclosed herein are an intelligent system and method for monitoring a generator reactive power limit using machine model parameters. The intelligent system and method for monitoring a generator reactive power limit using machine model parameters can calculate a maximum reactive power limit corresponding to over-excitation and a generator terminal voltage corresponding to under-excitation, estimate a correct field current even when system variable are changed, and monitor the generator reactive power limit by using machine model parameters and a one-machine infinite bus, to thereby supply a maximum or minimum reactive power to a power system within an allowable generator reactive power limit and prevent a generator trip caused by the reactive power limit and a power failure over a wide area.

Abstract: A system and method are provided to calculate a real time voltage stability risk index in a power system. The method includes calculating an RMS voltage by using bus voltage measured and calculating an N moving average voltage for the RMS voltages. A percentage diversity between the bus voltage measured and the N moving average voltages is calculated. A voltage stability in that risk index is calculated by dividing the area constructed by the percent diversity by the number of sections. The voltage stability risk index is transferred from a real time phasor measurement device to an upper voltage stability monitoring system. The transferred voltage stability risk indexes are acquired and sequenced and the sequence voltage stability risk indexes are output.