Abstract: Disclosed are signal transmitting apparatus and method capable of generating polarizations that can be controlled in real time by allocating weights to signals. A signal transmitting method for generating variable polarizations having any vector through a plurality of radiating elements vertical to each other includes: receiving an input signal and separating the input signal into a plurality of separated signals according to the number of radiating elements; and allocating weights for controlling vectors of the variable polarizations to each of the plurality of separated signals, wherein the vectors of the variable polarizations are represented by a vector sum of the plurality of separated signals allocated with weights.

Abstract: An antenna system includes: an orthogonal multi-polarization antenna configured to output independent double orthogonal polarizations through two independent input/output terminals; an antenna main control unit configured to perform a polarization control algorithm, collect and analyze information for polarization control, and provide polarization control information; and a polarization control unit configured to perform independent amplitude and phase control with regard to a pair of independent channels connected to the orthogonal multi-polarization antenna, based on the polarization control information received from the antenna main control unit, so that various polarizations are formed.

Abstract: Provided is a small monopole antenna, which can generate a plurality of resonant frequencies, have a high antenna efficiency, and be easily installed. The antenna includes a first antenna element formed of a coaxial cable; a second antenna element sealing the first antenna element and sharing a feed point with the first antenna element; and a feeder cable for feeding electric power to the feed point. This antenna is applied as a small antenna.

Abstract: Provided is a shaped-beam antenna having a multi-layered conductive element array surrounded by a dielectric ring. The shaped-beam antenna includes: a planar excitation element having a radiation structure according to a required polarization; a multi-layered conductive element array disposed on the planer excitation element, wherein the multi-layered conductive element array is formed by layering conductive elements at an arbitrary interval; and a dielectric ring surrounding the multi-layered conductive element array at a predetermined separation distance therefrom. Accordingly, it is possible to reduce the entire size of the shaped-beam antenna and manufacturing costs thereof.

Abstract: Provided is a mobile tri-band antenna system having low profile. The antenna system includes a tri-band feeding unit for dividing a satellite broadcasting signal by a signal channel in an azimuth angle and an elevation angle, and transmitting/receiving the satellite communication signal through distinguishing the satellite communication signal; a beam shaping unit for dividing the satellite broadcasting signals into a first channel signal and a second channel signal, combined power thereof through channel switching; an antenna controlling unit for driving an antenna system in an azimuth and elevation angle to direct the satellite according to the power combined second channel signal from the beam shaping unit; a first triplexer unit for outputting the power combined first channel signal to a rotary joint unit; a second triplexer unit for converting the first channel signal inputted to a downlink frequency and providing the converted first channel signal to the indoor apparatus.

Abstract: Provided is an antenna for a base station and a repeater capable of electrically or mechanically controlling the individual operation of an element antenna constituting an array antenna or a sub-array antenna so as to adaptively cope with the change in the communication environment, and having an economic and high performance transmitting and receiving function, and a method of controlling a mode of the antenna. The multi-mode antenna includes a radiation portion having one or more array antenna and capable of selectively changing an antenna effective opening surface and changing a resistance direction of an antenna beam pattern, an active channel portion connected to the array antennas and including switches, transmission and receiving channels, and a signal combiner and splitter, and a modem and control portion connected to the active channel portion and having a control portion and a modem.

Abstract: An antenna system includes: an orthogonal multi-polarization antenna configured to output independent double orthogonal polarizations through two independent input/output terminals; an antenna main control unit configured to perform a polarization control algorithm, collect and analyze information for polarization control, and provide polarization control information; and a polarization control unit configured to perform independent amplitude and phase control with regard to a pair of independent channels connected to the orthogonal multi-polarization antenna, based on the polarization control information received from the antenna main control unit, so that various polarizations are formed.

Abstract: An all-in-one multi-band antenna includes: a first antenna element configured to operate at a first frequency band, the first antenna element including a first ground, a first radiating part, and a first feed line and a first feed point through which a signal power is applied to the first radiating part; and a second antenna element configured to operate at a second frequency band, the second antenna element including a second ground, a second radiating part, and a second feed line and a second feed point through which a signal power is applied to the second radiating part, wherein the second radiating part is provided within a pseudo-cavity formed at a center portion of the first radiating part.

Abstract: Provided is an antenna system for tracking a satellite which includes a fixed body and a rotating body. The antenna system includes a transmitting/receiving unit having a transmitting channel and a receiving channel for signal power, a driving unit for enabling mechanical motion of the rotating body for satellite tracking, and a control unit for monitoring and controlling the operation of the driving unit. Accordingly, the various kinds of the components of the antenna system mounted and operated on the movable body can be minimized and the output of the transmitted signal required in the antenna system can be simply replaced, thereby simplifying the configuration of the system and reducing the production cost of the system. In addition, the STR having the tracking signal processing function in the digital mode as well as the general analog mode is mounted on the antenna system, thereby improving accuracy of satellite tracking.

Abstract: Provided are an apparatus for correcting a phase of a phased array antenna and a method thereof. The apparatus for correcting a phase of a phased array antenna for receiving a radio signal, includes a phased array antenna for receiving radio signals from a reference antenna and combining power of the received radio signals, a power dividing unit for dividing the combined power of the received radio signals, a voltage detecting unit for detecting voltage values of the divided radio signals, and a phase controlling unit for estimating a phase error that makes the detected voltage value maximum and controlling a phase of each radiation element of the phased array antenna using the estimated phase error.

Abstract: An antenna with controlled sidelobe characteristics includes: a power coupler configured to receive a signal to be transmitted and generate and output a main channel signal and an auxiliary channel signal; a main channel power distributor configured to receive the outputted main channel signal and distribute power of the main channel signal; a main antenna configured to receive the power-distributed signal, the main antenna including a one-dimensional or two-dimensional array of a number of antenna elements; a vector signal controller configured to control amplitude and phase of the auxiliary channel signal; an auxiliary channel power distributor configured to receive the controlled amplitude and phase of the auxiliary channel signal and distribute power of the auxiliary channel signal; and an auxiliary antenna independently installed separate from the main antenna, the auxiliary antenna including an antenna element or an array of a number of antennas.

Abstract: Provided are Circular Polarized Helical Radiation element and its Array Antenna operable in TX band and RX band. The circular polarized helical radiation element and its array antenna and the antenna with double reflection boards using that array can operate at TX/RX dual band which is high frequency such as Ka band by operating the helical antenna in axial mode and implementing dual feeding structure. The array antenna having a number of radiation elements operable in the both of TX band and RX band, wherein the radiation elements are arrayed on predetermined column lines, each radiation element comprising: a helix for radiating orthogonal circular polarized waves in the different frequency bands wherein the helix is fed at its beginning point and its terminating point; and a wave guide for accommodating the helix.

Abstract: Provided is an apparatus and method for estimating sensor signals to stabilize a posture of a mobile satellite tracking antenna.

Abstract: Provided is a conical scanning antenna system using a nutation method. The conical scanning antenna system includes: a main reflecting unit; a sub-reflecting unit which is disposed apart from the main reflecting unit by a predetermined distance and performing a conical scanning tracking by using the nutation method; and a feeding horn which doubly reflects electromagnetic wave inputted and radiated by the main reflecting unit and the sub-reflecting unit and inputs and outputs the electromagnetic wave by electrically steering beams.

Abstract: There is provided a comb polarizer suitable for millimeter band applications including: a waveguide having an aperture side formed of two separable half waveguides, and a comb shaped conductive unit having a plurality of cogs interposed between two half waveguides for transforming a linear polarized signal to a circular polarized signal.

Abstract: Provided is an apparatus and method for estimating sensor signals to stabilize a posture of a mobile satellite tracking antenna.

Abstract: Provided is a shaped-beam antenna having a multi-layered conductive element array surrounded by a dielectric ring. The shaped-beam antenna includes: a planar excitation element having a radiation structure according to a required polarization; a multi-layered conductive element array disposed on the planer excitation element, wherein the multi-layered conductive element array is formed by layering conductive elements at an arbitrary interval; and a dielectric ring surrounding the multi-layered conductive element array at a predetermined separation distance therefrom. Accordingly, it is possible to reduce the entire size of the shaped-beam antenna and manufacturing costs thereof.

Abstract: Provided is an apparatus and method for identifying a target satellite in a satellite communication antenna. The apparatus includes: a power splitting unit for splitting a signal inputted through the satellite communication antenna to more than two signals; a tuner unit for receiving the split signals from the power splitting unit and passing only signal of a predetermined channel frequency band; an analog-to-digital converting unit for converting each of signal intensities passed in the tuner unit to a digital value; and a controlling and identifying unit for determining whether a satellite traced by the satellite communication antenna is a target satellite using each of the signal intensities of the predetermined channel frequency band inputted from the A/D converting means, and controlling an orientation direction of the satellite communication antenna.

Abstract: Provided is a small monopole antenna, which can generate a plurality of resonant frequencies, have a high antenna efficiency, and be easily installed. The antenna includes a first antenna element formed of a coaxial cable; a second antenna element sealing the first antenna element and sharing a feed point with the first antenna element; and a feeder cable for feeding electric power to the feed point. This antenna is applied as a small antenna.

Abstract: Provided are a pedestal apparatus and a satellite-tracking antenna having the same. The pedestal apparatus includes: a fixing unit fixed at a moving object; a connecter for forming a first rotating axis vertically to the fixing unit; a first rotation supporter having a bottom fixed at the fixing unit and a Y-shaped top for rotating the tracking antenna around the first rotating axis; a second connecter connected to ends of the Y-shaped top for forming a second rotating axis; a second rotation supporter having both ends connected to the both ends of the second connecter for rotating the tracking antenna around the second rotating axis; a third connecter for forming a third rotating axis at a center of the second rotation supporter; and a supporter connected to the third connecter in a predetermined shape for supporting the tracking antenna, wherein the first, second and third rotating axes are not crossed one another.