Abstract: A system for controlling a mobile communication antenna is provided, which includes a plurality of antenna systems each installed in a BS, and a remote control system for monitoring and controlling the plurality of antenna systems. In each of the antenna systems, an antenna module includes a radiation plate and a radiation device for transmitting and receiving radio signals for a mobile communication service, a sensor unit senses the inclination and horizontal rotation of the antenna module, a transceiver transmits data sensed by the sensor unit to the remote control system and receives a control signal from the remote control system, and a controller controls an operation of the antenna system according to the remote control signal received from the transceiver.

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: A lamp for a camera-attachable streetlight is provided, which includes a camera-integrated bulb module. In the camera-integrated bulb module, there is a bulb portion, a camera module has a camera for capturing a predetermined area and a transceiver for transmitting data captured by the camera to an external server, a connector is inserted into a commercial socket, for receiving an external commercial power and has the same structure as a commercial connector inserted into a commercial socket, for receiving a commercial power, and a power distributor distributes the power received through the connector to the bulb portion and the camera module.

Abstract: Disclosed is a device selection structure for selecting one or more devices, comprising: a plurality of devices each having an input port and an output port; and a device module including a movement plate installed movably in conjunction with the plurality of devices, an input connector, and an output connector, wherein the input and output ports of the plurality of devices and the input and output connectors of the device module are installed so that during movement of the movement plate, the input and output ports of the plurality of devices are sequentially connected, at predetermined positions, to the input and output connectors of the device module.

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: 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: A Radio Frequency (RF) transmitter and a signal amplification method therefor are provided, in which a signal source generates a signal of a predetermined Intermediate Frequency (IF) band, a local oscillator generates a signal of a predetermined high frequency band as a carrier signal, a power amplifier amplifies the signal received from the local oscillator to a predetermined transmission level, and a parametric mixer module receives the signals from the signal source and the power amplifier and outputs the received signals as a radio signal for transmission. The signal output from the parametric mixer module is transmitted as the radio signal without additional amplification.

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: A wireless communication base station shares one antenna between a main system and a subsystem. A signal combiner/divider is connected to each of the transmission/reception signal lines of a main and a subsystem duplexer and combines signals according to their phases and divides other signals. A filter is provided in the signal paths between the combiners/dividers.

Abstract: Various multi-mode resonant filters including a housing having a cavity, are provided. The multi-mode resonant filters include a Dielectric Resonant (DR) element received in the cavity of the housing, and a plurality of transmission lines for connecting a point on one of a first axis, a second axis, and a third axis with a point on another axis. The first axis, the second axis, and the third axis are orthogonal to each other with respect to a center of the DR element.

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: A repeater installed in a moving object is provided, in which a link antenna module has a plurality of link antennas steered to predetermined directions, for wirelessly communicating with a Base Transceiver Station (BTS), a link antenna path setting module selects at least one of the plurality of link antennas of the link antenna module and connects a path between the selected link antenna and a rear end, a service antenna module has at least one service antenna installed within the moving object, for wirelessly communicating with Mobile Stations (MSs) within the moving object, a relay signal processing module is connected to the link antenna module through the link antenna path setting module and processes transmission and reception relay signals between the link antenna module and the service antenna module, a movement information module measures current movement information about the moving object and provides the current movement information, a received signal measuring module measures a received signal o

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 device for a mobile communication system is provided, in which a post has a selected external appearance. An antenna end is formed at an upper portion of the post for installing antenna parts, and a support end is formed at a lower portion of the post for fixing the antenna device to the ground. At least part of an external body of the antenna end is formed of a material that transmits transmission and received radio signals and a ground support member is formed under the support end to make an external body of the support end stand erect on the ground. The external appearance of the antenna device may take the form of a conventional utility, lamp, or sign post or pole.

Abstract: There is provided a lamp device including a housing having a plurality of radiation fins for heat radiation on a top surface portion thereof, a Light Emitting Diode heat (LED) substrate having a plurality of LEDs for emitting illumination light, and a cover formed of a transparent or semi-transparent light-transmitting material and installed to be engaged with the housing under the LED substrate, for protecting the LED substrate.

Abstract: An array antenna system in a BS, in which a horizontal-beam-radiation-pattern-forming module has a horizontal-beam-radiation-pattern-former to form a horizontal beam radiation pattern for transmission/reception signals, dividing signals received from input/output ports at one end, shifting the phases of the divided signals complementarily, combining the phase-shifted signals from the different input/output ports at the one end, outputting the combined signals to input/output ports at the other end, and outputting signals received from the input/output ports at the other end by a reverse operation to the input/output ports at the one end, receives/outputs a plurality of transmission/reception signals from/to a BTS via the input/output ports at the one end of the horizontal-beam-radiation-pattern-former, and receives/outputs a plurality of transmission/reception signals from/to a plurality of antennas via the input/output ports at the other end of the horizontal-beam-radiation-pattern-former, and a plurality of