Abstract: Disclosed is a transmission line-waveguide transition device including side surfaces and a top surface having a size and shape corresponding to a waveguide to which a signal of a transmission line is transmitted, the side surfaces and top surface having a plate shape; and a plate-shaped ridge formed in an inner space defined by the side surfaces and the top surface, the ridge being provided with a slope having one end connected to the transmission line and an opposite end contacting the top surface.

Abstract: The present invention provides a cavity filter having a slim and compact structure in which a push-pin type RF connector, which is formed such that a terminal is exposed to both sides or one side in a height direction, is embedded so as to reduce a size of an antenna system, quickly perform verification for an individual cavity filter while having high reproducibility, and enable the antenna system to be readily mounted.

Abstract: An antenna assembly including an antenna reflector steering mechanism is disclosed. A reflector steering structure for adjusting the horizontal azimuth of a reflector includes a drive motor disposed on the rear surface of the reflector, a planet gear rotated by the drive motor, and a sectorial rack gear engaged with the planet gear and fixed to a support shaft, thereby achieving a compact design of an entire antenna structure. Further, by applying a structure with enhanced electrical insulation to rolling and slide contact portions of the drive unit and a portion undergoing change in contact pressure, radio performance of the antenna system may be prevented from changing according to steering of the reflector.

Abstract: A multi-band antenna apparatus according to one of various embodiments of the present invention may comprise: an antenna housing in which an antenna module having two or more frequency bands is mounted; a plurality of repeaters detachably coupled to the antenna housing according to slide movement thereof; connector parts which protrude from the antenna housing and are connected to the plurality of repeaters, respectively; and a bracket which fixes the antenna housing to an outer wall and couples the plurality of repeaters to the antenna housing in an individually detachable manner.

Abstract: The present disclosure provides a polarized antenna including a waveguide power divider, a waveguide phase shifter and a radiating unit. The waveguide power divider is configured to have an input waveguide for receiving a transmission signal, and first and second output waveguides for distributing and outputting the transmission signal. The waveguide phase shifter is configured to receive two output signals outputted respectively from the first and second output waveguides of the waveguide power divider, to variably change a phase difference between the two input signals, and to output respective changed signals. The radiating unit is configured to receive the respective changed signals from the waveguide phase shifter, and to combine and radiate the respective changed signals as a radio signal.

Abstract: The present disclosure provides a radio frequency filter having a cavity structure including a housing, a cover and a resonance element. The housing has a hollow interior for providing a cavity, and an open side. The cover shields the open side of the housing. The resonance element is positioned in the hollow interior of the housing, and has a planar portion and a support for supporting and fixing the planar portion to the housing. The planar portion of the resonance element has at least two through holes, and the support has a lower end portion formed with a male thread structure for screw fastening. The housing is formed with a female thread structure to be screw fastened with the male thread structure formed at the lower end portion of the support.

Abstract: A compact antenna apparatus for a mobile communication system includes: a radome having at least one frequency band radiating element provided therein; at least one phase shifter portion which is provided in an inner side of the radome and which is connected to the radiating element to adjust a tilting angle of the radiating element; and a rotary knob portion which is provided so as to be exposed to the outside of the radome and which is directly coupled to the phase shifter portion to drive a phase shifter.

Abstract: The present invention relates to an omnidirectional antenna for a mobile communication service, comprising: a plurality of radiation elements disposed on a horizontal surface with a mutually same angle so as to respectively radiate beams; and a power supply unit for distributing and providing a power supply signal to each of the plurality of radiation elements, wherein each of the plurality of radiation elements has a structure in which a horizontal polarization dipole radiation unit having two radiation arms is coupled to a vertical polarization dipole radiation unit having two radiation arms.

Abstract: A multi-mode resonator includes: a housing having a cavity therein; and a plurality of resonance ribs which are arranged radially around a center of the cavity with a predetermined interval therebetween. Each of the plurality of resonance ribs includes a body having a lower end and an upper end. The lower end of each of the plurality of resonance ribs is fixed to a bottom surface of the housing, and the body of the each of the plurality of resonance ribs is bent so that the upper end of each of the plurality of resonance ribs points to the center of the cavity.

Abstract: An antenna control system in a base station system, and a configuration method of the antenna control system are disclosed. A method of controlling antennas in a multi-ALD (Antenna Line Device) system including ALDs and ports linked with multiple base stations is provided including receiving configuration command by one of ALDs from one of base stations, transferring configuration command by the ALD that received configuration command to each of remaining ALDs, and setting an antenna for controlling or port for linking by each ALD according to the configuration command. In accordance with some embodiments, a multi-ALD system for controlling a plurality of antennas includes ports for linking with multiple base stations, respectively, and ALDs for controlling the antennas, wherein the ALDs are linked for intercommunications with each other, to set an antenna to control or a port to link according to configuration command received from one of the base stations.

Abstract: The present invention relates to a radio frequency filter employing a notch structure, wherein the notch structure is a dual notch structure which comprises: a C notch structure formed in a predetermined region at a partition between two cavities to be cross-coupled; and an L notch structure formed together with the C notch structure in a predetermined region at a partition between two cavities.

Abstract: A signal distributing/combining apparatus in an antenna device of a mobile communication base station includes a circuit board configured to have an upper surface formed with a signal distributing/combining conductor pattern for a high frequency signal distributing/combining operation, and a support plate configured to have an upper mounting surface of a size corresponding to the circuit board, to mate with the circuit board so that an underside of the circuit board is in close contact with the upper mounting surface for supporting the circuit board, and to fixedly mate with the antenna device at a reflection plate on a bottom side of the support plate. The support plate is provided with a plurality of cable holders for supporting and fixating coaxial cables for signal transmission which are connected from outside of the apparatus.

Abstract: A portable antenna control device includes: a main controller for generating a control signal for adjusting a device provided in an antenna; a modem unit for converting the control signal generated by the main controller into an on-off keying (OOK) signal; a power management unit for supplying direct current power; and an OOK port for synthesizing and outputting the OOK signal converted by the modem unit and the direct current power supplied by the power management unit.

Abstract: The present invention relates to a multiband antenna comprising: a reflector providing a ground plane; a first radiation module for a first frequency band, provided on the reflector; and a plurality of second radiation modules for a second frequency band, laminated on the first radiation module, wherein: the first radiation module includes first to fourth radiation elements symmetrically combined in four directions on an entire plane, wherein each of the first to fourth radiation elements includes a radiation arm in a cup shape and a support for supporting and fixing the radiation arm to the reflector, and the second radiation modules are provided to each radiation arm of the first to fourth radiation elements, wherein the lower surface of the cup shape of each radiation arm of the first to fourth radiation elements is designed to have a predetermined area for providing the ground plane to the second radiation modules.

Abstract: In the present invention, a radio communication antenna having a narrow beam width comprises: a reflecting plate provided in the form of a plate of rectangular shape; and one radiating module disposed on the reflecting plate and generating x-polarized waves. Here: the radiating module comprises four radiating elements of dipole structure; the four radiating elements are respectively disposed at four edge portions of the reflecting plate, and each comprises two radiating arms placed in the direction extending along both sides relative to the edges; and, among the four radiating elements, those radiating elements that face each other diagonally are linked in movement so as to generate one of the x-polarized waves.

Abstract: The present invention relates to a dual-polarization antenna including an isolation providing device including: a transmission antenna element outputting a transmission signal provided via a feeder through a first port; a receiving antenna element receiving a reception signal so as to provide same to the second port; a first coupler distributing part of the transmission signal; an equalizer equalizing the distributed signal from the first coupler to a preset waveform; a second coupler receiving the output of the equalizer so as to couple same to a signal output to the second port; and a conductor forming a signal delivery path between the first coupler, the equalizer, and the second coupler.

Abstract: An antenna device according to one of various examples of the present invention can comprise: an antenna module; a radio remote head (RRH) for receiving signals from the antenna module and a base station; guide modules for guiding the RRH such that the RRH slidably moves in an inclined state in the antenna module, for providing one end portion of the RRH to be rotated, and for providing the other end portion of the RRH to move vertically in the sliding movement direction; connection modules provided on a surface on which the antenna module and the RRH face each other, and electrically connecting the RRH and the antenna module; and coupling modules provided on one side of the RRH so as to move the connection modules, thereby mutually coupling or separating the connection modules.

Abstract: An automatic RF filter tuning system and a method for manufacturing a filter using the same are disclosed. An RF filter tuning system for tuning an RF filter that includes a plurality of cavities having resonance elements and a cover having tuning areas that are positioned correspondingly to the resonance elements, includes a measuring unit configured to measure resonance characteristics of the cavity of the RF filter, a control unit configured to calculate a tuning value of the RF filter based on the resonance characteristics, and a tuning unit configured to tune the RF filter based on the tuning value calculated by the control unit. The tuning unit includes a striking unit configured to strike the tuning area of the cover of the RF filter, thereby adjusting the resonance value and tuning the RF filter.

Abstract: The present invention relates to a multi-mode resonator comprising: a housing in which a cavity corresponding to a substantially single accommodating space is arranged; and multiple resonance ribs which are arranged at a predetermined interval therebetween in the cavity, have lower ends fixed to a floor surface of the housing, have upper ends facing each other, and generate a resonance signal by multiple coupling therebetween.

Abstract: The present invention relates to a multimode resonator comprising: a housing provided with a cavity substantially corresponding to one accommodation space; a plurality of resonance arms arranged at preset intervals from each other in the cavity and generating resonance signals by complex mutual coupling; and a plurality of resonance legs for respectively supporting the plurality of resonance arms.