Abstract: A spherical lamp with easy heat dissipation comprises: a lower substrate and an upper substrate, in each of which a plurality of LEDs are embedded; a substrate support portion having a plate shape, to which the lower and upper substrates are coupled and fixed to lower and upper portions thereof, respectively; lower and upper covers, which are fixed to lower and upper portions of the substrate support portion, respectively, and each of which has a semi-spherical shape; a support portion, which is connected to an upper center portion of the substrate support portion and is exposed to the exterior through a center portion of the upper cover; and a heat dissipation plate which is formed on a rear surface of the heat dissipation plate and provided with a coupling portion into which an end of the support portion is inserted and fixed.

Abstract: An LED lighting apparatus is provided. The LED lighting apparatus includes a case part which covers a residual part, excluding a light-emitting surface, to provide a reflective space and has a predetermined depth and in which an upper edge of the inside thereof has a slope. Further, a receiving surface has a lateral surface portion of the case part that is bent toward the inside of the case. A substrate is fixed on the receiving surface and a plurality of LEDs are provided. A reflective part located in an upper center portion of the inside of the case part reflects the light of the LEDs and enables reflection and diffusion of light within the reflective space provided from the case part.

Abstract: The present invention relates to a device for sharing the antennas of wireless access node systems in a wireless communication network comprising a wireless access node system A and a wireless access node system B, each of which comprises at least one transmission/reception unit for processing transmission/reception signals in at least one frequency band, the device comprising: an MIMO coupler A for coupling a signal in a first transmission/reception route among multiple input multiple output (MIMO) routes for said at least one transmission/reception unit of the wireless access node system A, and a signal in a second transmission/reception route among MIMO routes for said at least one transmission/reception unit of the wireless access node system B, to the antenna of the wireless access node system A; and an MIMO coupler B for coupling a signal in a first transmission/reception route among the MIMO routes for said at least one transmission/reception unit of the wireless access node system B, and a signal in a

Abstract: A method and an apparatus for determining validity of samples for a digital pre-distortion apparatus is disclosed. It is an object of at least one embodiment to provide a method and an apparatus for determining validity of samples for a digital pre-distortion apparatus that is configured to compensate for nonlinearity of a power amplifier in an efficient manner by accurately estimating a pre-distortion coefficient with a low-capacity memory.

Abstract: An LED lighting device includes a case unit forming a light emitting space, wherein resting surfaces are formed at predetermined areas on the inner side of the case unit, substrates having LEDs mounted thereon and respectively rested on the plurality of resting surfaces, and heat-dissipating units formed in the outer side of the case unit for heat dissipation. Lifespan and user convenience can be improved.

Abstract: The present invention relates to a helmet and a method for dealing with an accident using the helmet, which the helmet includes: a helmet body part made of a resin having a semi-spherical space for receiving the head of a wearer; a light part arranged in the front of the helmet body part having LEDs mounted on a substrate to provide the wearer with lighting; a metallic heat radiator extending from the front of the helmet body part to the back thereof along the upper central line of the helmet body part and partially contacting the back of the substrate to discharge heat; a communication device part received in the helmet body part for dealing with communication and emergency circumstances; and a battery received in the helmet body part for supplying power to the communication part and light part.

Abstract: The present invention relates to a radio frequency filter having a cavity structure, comprising: a container which has a hollow inner portion and a cavity that is cut off from the outside, and a resonance element which is placed in the hollow inner portion of the container, wherein the container has a wrinkled structure for adjusting the intervals between a longitudinal front end surface of the resonance element and the inner surfaces of the container facing the longitudinal front end surface using external pressure. Thus, the invention can be further miniaturized and is lightweight, and the design of the invention enables frequency tuning without employing a coupling structure of a tuning screw and a fastening nut, thereby obtaining a convenient and simplified structure.

Abstract: Provided is an apparatus for tuning the voltage standing wave ratio (VSWR) of a base station system in a wireless communication network, the apparatus comprising: a VSWR changing unit for changing the characteristics of the VSWR of an antenna by changing electrical signal transmission characteristics of an internal power feedline by means of an external operation, or by changing the characteristics for transceiving a radiating member; a driving unit for driving the VSWR changing unit in accordance with a control signal; a VSWR detection unit for detecting the corresponding VSWR for the installed antenna and generating a detection signal on the basis thereof; and a control unit for controlling the actions of the VSWR changing unit for changing the VSWR characteristics by controlling the operation of the driving unit, if a VSWR characteristic is determined to be in an abnormal state on the basis of the detection signal generated by the VSWR detection unit.

Abstract: A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.

Abstract: A Radio Frequency (RF) filter configured by combining a hybrid coupler with a general filter, for having different characteristics from original characteristics of a general filter is provided, in which a coupler receives an input signal through a first port, divides the input signal, outputs the divided signals through second and third ports, combines signals received through the second and third ports according to phases of the signals, and outputs the combined signal through the first port or as an output signal of the RF filter through a fourth port, and a first filter unit has a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic.

Abstract: The present invention relates to an easily expandable indoors LED lighting device, comprising: a fixing bar which is installed on a ceiling; first and second electrode bars, which are provided on a rear surface of the fixing bar; a socket which is provided at the center of the fixing bar that is provided with the first and second electrode bars; and a bell-shaped reflective portion, which is coupled to the socket, for providing power from the first and second electrode bars to a substrate on the inside of which an LED is mounted. The present invention is lightweight, can be directly installed on the ceiling by coupling, and enables expanded installation of the lighting device that is modularized in accordance with the surface area of the ceiling, thereby providing the advantage of easy installation.

Abstract: The present invention relates to an LED lighting apparatus. The LED lighting apparatus includes: a power source housing provided with a power supply unit therein and having a plurality of connection parts disposed on a bottom surface thereof; a ring-shaped frame on which a connection frame coupled to the connection parts of the power source housing is disposed, with the ring-shaped frame accommodating a transmission line through which power from the power supply unit is supplied; and a plurality of lighting part housings coupled to a lower portion of the frame to receive the power through the transmission line, thereby applying the power to the accommodated LED to emit light. Thus, the lighting part housings of the LED lighting apparatus may be changed in quantity and position to vary light distribution and luminance.

Abstract: The present invention relates to an LED surface light-emitting device for easy shielding, and a manufacturing method thereof, and includes: an integrated type rear-surface case part having an accommodation space portion open toward the front surface portion thereof, wherein a substrate equipped with LEDs is accommodated in the accommodation space portion; a diffusion panel which covers the open front surface portion of the rear-surface case part, and diffuses light of the LEDs to be a surface light source; and a front-surface window frame, the rear surface of which is coupled to the boundary of the front surface portion of the rear-surface case part, with the diffusion panel located on the rear-surface case part. The present invention is configured as a single body without openings to prevent dust and insects from coming therein, and thus can prevent brightness from decreasing according to use.

Abstract: The present invention discloses a base station, the size of which is reduced and which is to be adopted in a mobile communication system. The disclosed small base station includes: a polyhedral housing; an antenna unit disposed on the widest surface of the outer surface of the housing; a first board arranged on any outer surface of the housing; and two or more boards which are arranged in an upright state with the first board and which are arranged to face three or more outer side surfaces of the housing, respectively.

Abstract: The present invention relates to a lighting device enabling arbitrary distribution of light, which includes: a hollow receptacle having a cover to be opened or closed; a pivot part mounted in a fixing hole provided in the bottom of the receptacle so as to be tilted and pivoted; a light module part connected through an adjustment shaft to the pivot part, the light module part being tilted and pivoted by the pivot part so as to control the distribution of light; and a fixing part for adjusting the pivot part to be fixed or to be tilted and pivoted. The present invention enables a plurality of light modules to be separately adjusted to control the distribution of light, and provides fixing means for fixing the positions of the light modules thus adjusted, so that the distribution of light may be controlled regardless of the installed position of the lighting device, thereby preventing light from penetrating into surrounding buildings.

Abstract: An LED lighting apparatus having adjustable light distribution comprises: a support panel on which a plurality of heat dissipation fins are disposed on a back surface thereof, the support panel providing a parallel front part which is not parallel to the ground; a board on which a plurality of LEDs are mounted, and being coupled to said front part of the support panel; and a reflection part fixed to the support panel so as to be disposed on the front surface of said substrate, and reflecting light emitted from said plurality of LEDs to provide a curved reflection surface which forms light distribution patterns on the ground. The light emission surface of the LED is not disposed parallel to the ground. The light emitted from the LED is distributed through the reflection part having a curved surface reflecting the light emitted from the LED toward the ground.

Abstract: The present invention relates to an antenna of a mobile communication base station, comprising; an RET driving unit, an RAS driving unit, and an RAB driving unit, each comprising a driving motor, for driving electrical and mechanical devices for respectively adjusting RET, RAS and RAB; and multi-function equipment for controlling the driving of the RET driving unit, the RAS driving unit and the RAB driving unit by communicating with a main system of a base station such that at least a control signal for controlling the RET, the RAS, and the RAB is received.

Abstract: The present invention relates to a method for illuminating a space, and more specifically, to a method for illuminating a space using a plurality of LED illumination modules, wherein the plurality of LED illumination modules adjust a mutual distribution ratio between a vertical illuminance and a horizontal illuminance, which is greater than the vertical illumination, according to a limitation of a radiation angle at one point within the space having the constant volume. The present invention can increase the efficiency of illumination and can reduce electric energy by lowering the vertical illuminance compared to the horizontal illuminance.

Abstract: The present invention relates to a dual polarization antenna comprising a reflection plate, and a radiating module including first to fourth radiating elements having respective first to fourth radiating arms having respective bent portions. The bent portions of the first to fourth radiation arms are sequentially adjacent to each other, and sequentially form and shaped structures. The and shaped structures are located on a third quadrant, a fourth quadrant, a second quadrant, and a first quadrant, respectively. The first to fourth radiating elements have supports integrally extending from the bent portions of the first to fourth radiating arms to the reflection plate. The radiating module includes a first feeder line installed to transmit signals to the first and third radiating arms, and a second feeder line installed to transmit signals to the second and fourth radiating arms.

Abstract: A street lamp for providing the safe driving information comprises: a main lighting portion for lighting a road; a vehicle reception portion for receiving an accident or malfunction occurrence signal from a vehicle in an accident or which is malfunctioning; a control portion for generating accident or malfunction recognition signals that can be distinguished, in accordance with the reception of the accident or malfunction occurrence signal; and a vehicle transmitting portion for selectively transmitting the accident or malfunction occurrence signal to vehicles in front and behind the location of the accident or the malfunction.