Abstract: Disclosed is a method for operating sectors of a base station in a mobile telecommunication system. For this, the method includes the steps of: outputting, at a prescribed time period equal to T1, data, including alpha sector data, beta sector data, and gamma sector data, which is to be transmitted to a mobile station, in sequence and by sectors; dividing a frequency in a scheme of time division at a time period which equals either t?, t? or t? and which corresponds to the data length by the sector of data which is output in the outputting data, and carrying out a frequency assignment in sequence and by the sector. Accordingly, only relevant data is transmitted to a sector assigned the frequency, and a traffic variation of each sector can be met.

Abstract: A radio frequency filter comprising: housing body having input/output connectors and containing space which is divided into spaces by means of diaphragm; at least one resonator rod arranged in the housing; housing cover coupled to the housing body; wherein the housing body and the housing cover are coupled to each other by laser welding. The radio frequency filter according to the present invention can reduce PIMD due to reduce Contact Nonlinearity, and inhibit to erode away because the laser welding method dissolve different metallic materials each other and take a convalent bond, and reduce its manufacturing process time and cost because it is unnecessary drilling a hole and fastening a screw to fasten the housing and the housing cover each other and can simplify its manufacturing process and raise productivity because only irradiate laser beam on irradiated area of the housing cover.

Abstract: A switchable combiner/divider with multiple inputs/outputs is provided. The switchable combiner/divider with multiple inputs/outputs includes multiple input ports for receiving multiple incoming signals, multiple output ports, a switching part for alternately connecting the multiple input ports to output ports as a circulating configuration, and a controller for providing switching control signals to the switching part.

Abstract: An RF switch is provided. In the RF switch, a slot line is divided into a first slot line and a second slot line and an open-end circuit is provided at each end portion of the first and second slot lines. A first transmission line delivers signals from and to the first slot line, and a second transmission line delivers signals from and to the second slot line. A third transmission line delivers signals from and to the portion of the slot line that separates the first slot line from the second slot line. A variable sub open-end circuit portion includes at least one open-end circuit which is selectively switched to the first or second slot line according to an external switching control signal.

Abstract: An enclosure device of a wireless communication apparatus, which has a tubular structure with increased heat dissipation not unknown heretofore. A section of the enclosure device has a polygonal or circular shape, such as a substantially cylindrical structure, and the enclosure, which has a plurality of radiation fins arranged on an outer surface of the enclosure in a vertical direction, is formed integrally with the radiation fins by using a compression method. Various communication devices of the wire communication apparatus are mounted on the interior of the enclosure. The structure is preferably formed by the radiation fins and exhibits an increased radiation effect than that of a structure where radiation fins are arranged side by side on a flat plane.

Abstract: A network image forming apparatus and method that facilitate an information exchange among users on a network. The network image forming apparatus and method are connected to a plurality of user terminals on a network and print data transmitted from the plurality of user terminals. The network image forming apparatus and method include an interface unit for transmitting and receiving specified data to and from the user terminals, and a storage unit for storing shared information if the shared information on the network is transmitted from one of the user terminals. Accordingly, the network image forming apparatus and method provide an announcement function for sharing information among a plurality of user terminals on the network, and the message function enabling the message transfer between the plurality of the user terminals on the network.

Abstract: Disclosed is a variable phase shifter The variable phase shifter includes a housing; a fixed board unit fixedly installed inside the housing, equipped with an input microstrip line with a via hole for receiving an input signal on one face thereof, and equipped with at least one circular arc-shaped output microstrip line outside the input microstrip line; and a rotating board unit rotatably installed inside the housing while being in contact with the one face of the fixed board unit, equipped with a transmission microstrip line on a face coming in contact with the one face of the fixed board unit, and for providing at least one output signal by making coupling even during rotation thereof.

Abstract: Provided is a method for mounting a Printed Circuit Board (PCB). The method includes providing a solder cream on a predetermined region of a bottom surface of the PCB except for a region requiring insulation, mounting the PCB on a mounting region of a housing on which the PCB is to be mounted, and fixedly coupling the PCB to the housing by melting and hardening the solder cream provided on the bottom surface of the PCB.

Abstract: An RF switch is provided. In the RF switch, a T-junction slot line has a horizontal slot line and a vertical slot line. An open-end circuit is provided at each end portion of the horizontal and vertical slot lines. A first transmission line delivers signals from and to one portion of the horizontal slot line, and a second transmission line delivers signals from and to the other portion of the horizontal slot line. A third transmission line delivers signals from and to the vertical slot line. A switching circuit selectively switches the signal path of the one or the other portion of the horizontal slot line to the vertical slot line according to an external switching control signal.

Abstract: A variable radio frequency band filter capable of varying the resonance frequency band comprises a housing having a support; a number of resonator rods arranged along the longitudinal direction of the housing; at least one tuning rod positioned on top of the resonator rods; a tuning support extending through the respective tuning rods along the longitudinal direction of the housing and adapted to slide on top of the respective resonator rods to vary the position of the tuning rods; and a frequency variation unit positioned on a lateral surface of the housing. The frequency variation unit being coupled to an end of the tuning support and adapted to vary the position of the tuning rods, as the tuning support is slid, according to the frequency band.

Abstract: An antenna management system is disclosed for managing cellular communications network antennas remotely in response to traffic demands and environmental factors, including a packet switching network, antennas, base transceiver stations, tilt controllers, air interface modules, a management database, and a control network. In the exemplary embodiment, the system utilizes feedback from a variety of sensors including downtilt sensors, azimuth sensors, weather sensors, gas sensors, and a camera. The system enables data from the sensors to be viewed remotely and analyzed to determine if corrective adjustment of the antenna(s) is needed. After analyzing the data, the system or a user of the system such as a network operator can remotely adjust the antenna(s) to make necessary adjustment(s).

Abstract: A printing system and a method of charging to print a document therein. The printing system includes a server and a printing apparatus. The sever includes a storing part in which reference information on a document to be printed, a host communication part which receives a document including relevant information, and a host controller which charges a document registrant corresponding to the relevant information to print the document. The printing apparatus includes a printer communication part which receives the document, and a printer controller which prints the document received through the printer communication part.

Abstract: In the wireless communication base station sharing apparatus, a first signal combiner/distributor is connected to a main system duplexer through a first port, distributes a signal received through the first port to second and third ports, combines the signals received through the second and third ports according to the phases of the signals, and provides the combined signal through the first port or a fourth port. A second signal combiner/distributor is connected to a subsystem duplexer through a fifth port and the antenna through an eighth port, distributes a signal received through the fifth port to sixth and seventh ports, combines the signals received through the sixth and seventh ports according to the phases of the signals, and provides the combined signal through the fifth or eighth port. Variable filters are provided in signal paths between the first and second signal combiner/distributors.

Abstract: An RF switch is provided. In the RF switch, a slot line is divided into a first slot line and a second slot line and an open-end circuit is provided at each end portion of the first and second slot lines. A first transmission line delivers signals from and to the first slot line, and a second transmission line delivers signals from and to the second slot line. A third transmission line delivers signals from and to the portion of the slot line that separates the first slot line from the second slot line. A variable sub open-end circuit portion includes at least one open-end circuit which is selectively switched to the first or second slot line according to an external switching control signal.

Abstract: An RF switch is provided. In the RF switch, a T-junction slot line has a horizontal slot line and a vertical slot line. An open-end circuit is provided at each end portion of the horizontal and vertical slot lines. A first transmission line delivers signals from and to one portion of the horizontal slot line, and a second transmission line delivers signals from and to the other portion of the horizontal slot line. A third transmission line delivers signals from and to the vertical slot line. A switching circuit selectively switches the signal path of the one or the other portion of the horizontal slot line to the vertical slot line according to an external switching control signal.

Abstract: A variable radio frequency band filter capable of varying the resonance frequency band comprises a housing having a support; a number of resonator rods arranged along the longitudinal direction of the housing; at least one tuning rod positioned on top of the resonator rods; a tuning support extending through the respective tuning rods along the longitudinal direction of the housing and adapted to slide on top of the respective resonator rods to vary the position of the tuning rods; and a frequency variation unit positioned on a lateral surface of the housing. The frequency variation unit being coupled to an end of the tuning support and adapted to vary the position of the tuning rods, as the tuning support is slid, according to the frequency band.

Abstract: A variable phase shifter is provided. In the variable phase shifter, a fixed substrate, which is a dielectric substrate, is fixedly mounted in a housing and has at least one arc-shaped microstrip line on one surface thereof. A rotation substrate, which is a dielectric substrate, is rotatably mounted in the housing, in contact with the other surface of the fixed substrate and has a slot line on the contact surface thereof. Microstrip-slot line coupling takes place between the microstrip line and the slot line even during rotation. Both ends of the microstrip line are connected to an output port of the variable phase shifter and the slot line is electrically connected to an input port of the variable phase shifter, for receiving an input signal.

Abstract: Disclosed is a tower top amplifier directly and detachably attached and electrically connected to an antenna of a base station for mobile communication. The tower top amplifier includes a tower top amplifying unit (20) connected to an antenna unit (10), and a connecting unit (30) provided on one surface of the antenna unit (10) for connecting the tower top amplifying unit (20) and the antenna unit (10). The tower top amplifying unit (20) is directly attached and electrically connected to the antenna unit (10) without any cable, thereby causing the tower top amplifier to be simply assembled and disassembled. The tower top amplifier does not require the cable exposed to the outside, thus having an aesthetic appearance. The tower top amplifying unit (20) having the same shape as that of the antenna unit (10) is detachably attached to the antenna unit (10), thereby being formed integrally with the antenna unit(10).

Abstract: A variable beam controlling antenna for a mobile communication base station having at least two radiator portions that are arranged vertically, with each portion having a reflector with at least one radiator installed therein. At least one force generator provides rotational force when applied on external control signal, and a force transfer portion transfers the rotational force generated from the force generator to at least one reflector, thus rotating the at least one reflector. The variable beam controlling antenna can be fabricated at a low cost and allows for easy automatic optimization, which is required for a mobile communication wireless network since it is configured to be a one-column antenna capable of controlling a horizontal beam width. Although conventionally many kinds of antennas with different beam widths are needed for base station sectors, the single antenna can easily change its beam width.