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 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 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: The present invention provides a coaxial RF cable connection device.

Abstract: A Base Station (BS) antenna in a mobile communication system is provided, in which a reflective plate has a frontal surface onto which radiation elements are attached, and at least one protector is attached onto the reflective plate, surrounding at least part of the reflective plate.

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: The present invention relates to a stripline connection apparatus for transmitting signals between at least one pair of striplines. The stripline connection apparatus comprises a coupling member arranged between the pair of striplines so as to transmit signals to each stripline via inductive coupling. The coupling member includes a conductor, both ends of which face the respective striplines, and a gap-maintaining means for maintaining a predetermined gap between the conductor and the striplines.

Abstract: A method for installing radiator elements arranged on different planes and an antenna having the radiator elements are provided, in which a first-position radiator element is placed on one plane, a second-position radiator element is placed on another plane, and power supply cables are connected to the first-position radiator element and the second-position radiator element. The power supply cables are designed to compensate for a phase difference between signals radiated in the air from the first-position radiator element and the second-position radiator element by a phase difference between signals propagated via the power supply cables.

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: 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: A system for providing image information using mobile communication BS antennas is provided, in which each of a plurality of mobile communication BS antennas has a camera module for capturing a full area where the camera module is installed and transmits BS image information captured by the camera module to a remote control system, the remote control system has a BS image DB server and stores the BS image information received from the plurality of mobile communication BS antennas on a BS basis and on an antenna basis in the BS image DB server, and a service server receives the BS image information from the BS image DB server and provides the BS image information to a user terminal.

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: An array antenna system in a BS has a horizontal-beam-radiation-pattern-forming module for receiving/outputting 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 receiving/outputting 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 vertical-beam-radiation-pattern-forming modules installed on the plurality of antennas, respectively, to form a vertical beam radiation pattern for the transmission/reception signals, each for receiving a transmission signal from the horizontal-beam-radiation-pattern-forming module, dividing the transmission signal, providing the divided signal to antenna elements, filtering and amplifying signals received from the antenna elements according to a predetermined reception band, combining the amplified signals, and providing the combined signa

Abstract: A radio frequency repeater is provided. A donor antenna transmits a signal to and receives a signal from a base station. A service antenna transmits a signal to and receives a signal from a mobile station. A repeater filters and amplifies a signal between the two antennas. A polarization variation unit variably selects a polarization direction of at least one of the donor antenna and the service antenna in response to a detection signal of an isolation detector for detecting isolation between the two antennas. The isolation between the donor antenna and the service antenna can be sufficiently ensured.

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: A broadband dipole antenna is provided, in which a radiator includes a plurality of radiation pattern units for transmitting and receiving a radio signal, the radiation pattern units have radiation patterns of resonators formed thereon, and a power supply and balun structure supports and supplies power to the radiator. Each of the plurality of radiation pattern units of the radiator has at least a dual radiation pattern structure having an inner radiation pattern and an outer radiation pattern.

Abstract: Disclosed is a dual-band dual-polarized antenna for a mobile communication base station, which includes: a reflection plate; a first radiation device module for transmitting and receiving two linear orthogonal polarizations for a first frequency band, the first radiation device module generally having a square shape, the first radiation device module including a plurality of dipoles arranged to form the square shape, each of the dipoles substantially having a transverse side and a vertical side; and a second radiation device module for a second frequency band which is arranged within the square shape of the first radiation device module, and includes a plurality of dipoles generally arranged to form a cross-shape.

Abstract: Disclosed is a radio frequency (RF) switch including: a circulator having first to third nodes, which are connected to first to third ports, respectively; and a slot line pattern unit installed in a connection line between the third node of the circulator and the third port so as to carry out signal transmission or interception, wherein the slot line pattern unit includes a switching circuit, which is installed at a predetermined location so as to transmit or intercept a signal by maintaining or short-circuiting a gap of a slot line corresponding to the installed location according to an external switching control signal.

Abstract: Disclosed is a variable phase shifter, the variable phase shifter including: a fixed board which is fixedly provided in a housing, and consisting of a dielectric board, and consisting of a dielectric board, having a second transfer stripline having at least one arc-shaped output micro stripline on one surface; a rotating board rotatably provided within the housing while coming in contact with the one surface of the fixed board, and consisting of a dielectric board, having a second transfer stripline coupled to the arc-shaped output micro stripline on a surface where the rotating board comes in contact with the one surface of the fixed board even when the rotating board rotates; wherein both the sides of at least one output micro stripline of the fixed board are connected to an output port, and the other surface of the fixed board includes an input micro stripline, so that the other surface of the fixed board is electrically connected and receives an input signal.