Abstract: Disclosed is a phased-array antenna. The phased-array antenna includes a plurality of element antennas having feed lines formed thereon, antenna modules configured to extend and be disposed in longitudinal directions of the element antennas and independently connected to one ends of the plurality of element antennas, respectively, and a signal distribution module disposed in a direction perpendicular to the antenna modules, having one side surfaces being perpendicularly connected to each of the antenna modules, and configured to distribute an input signal to the corresponding antenna modules through connection pins whose one sides are respectively connected to the antenna modules.

Abstract: Disclosed is a phased-array antenna. The phased-array antenna includes a plurality of element antennas having feed lines formed thereon, antenna modules configured to extend and be disposed in longitudinal directions of the element antennas and independently connected to one ends of the plurality of element antennas, respectively, and a signal distribution module disposed in a direction perpendicular to the antenna modules, having one side surfaces being perpendicularly connected to each of the antenna modules, and configured to distribute an input signal to the corresponding antenna modules through connection pins whose one sides are respectively connected to the antenna modules.

Abstract: A Ka-band high power amplifier structure having minimum processing and assembling errors, which uses a technique in which input and output waveguide flanges of individual amplifiers which are connected in parallel are connected to a waveguide divider and a waveguide combiner from above, and uses a waveguide transition patch implemented on an interconnect substrate for coupling to the individual amplifier to avoid the use of an input and output connector pin and an interconnector.

Abstract: The present invention relates to a smart upconverter for a broadband satellite communication. The smart upconverter of the present invention automatically senses the detailed band from among the IF bands of a broadband in a broadband satellite communication earth station, to which a transmission signal belongs, and pre-removes the detailed band which is not used in upconverting but generates spurious, thus preventing spurious (2IF+LO) problems in an in-band including the transmission signal.

Abstract: Disclosed is a multi-channel signal receiver technology. An RF front-end in an RF receiver receiving at least two RF signals with different transmission bandwidths includes: at least two RF tuners receiving, amplifying, and frequency-converting the at least two RF signals, respectively; a switch selecting one of signals output from the at least two RF tuners; a channel filter eliminating interference signals included in a signal output from the switch, and passing a signal of a transmission band; an ADC converting the signal output from the channel filter into a digital signal; a fixed sampling frequency generator generating and transferring a fixed sampling frequency to the ADC. In the RF front-end, by processing filtering and sampling of signals with a narrow transmission bandwidth through a residual calculation capacity of a digital processor a construction of an RF front-end may be simplified and manufacturing costs may be reduced.

Abstract: Disclosed is a multi-channel signal receiver technology. An RF front-end in an RF receiver receiving at least two RF signals with different transmission bandwidths includes: at least two RF tuners receiving, amplifying, and frequency-converting the at least two RF signals, respectively; a switch selecting one of signals output from the at least two RF tuners; a channel filter eliminating interference signals included in a signal output from the switch, and passing a signal of a transmission band; an ADC converting the signal output from the channel filter into a digital signal; a fixed sampling frequency generator generating and transferring a fixed sampling frequency to the ADC. In the RF front-end, by processing filtering and sampling of signals with a narrow transmission bandwidth through a residual calculation capacity of a digital processor a construction of an RF front-end may be simplified and manufacturing costs may be reduced.

Abstract: There is provided a method for effectively estimating transmission modes and lengths of guard intervals in the implementation of an integrated services digital broadcasting-T (ISDB-T) receiver.

Abstract: Provided are an apparatus, a method, a receiver, and a computer readable recording medium for time synchronization offset compensation. The apparatus includes an average time synchronization offset calculator, a reference clock frequency difference calculator, and a time synchronization offset compensator. The average time synchronization offset calculator calculates an average time synchronization offset between a phase reference symbol of a time-synchronization acquired frame and phase reference symbols of frames subsequent to the time-synchronization acquired frame. The reference clock frequency difference calculator calculates a reference clock frequency difference between a transmitter and a receiver. The time synchronization offset compensator compensates a time synchronization offset.

Abstract: Provided are an apparatus, a method, a receiver, and a computer readable recording medium for time synchronization offset compensation. The apparatus comprises an average time synchronization offset calculator, a reference clock frequency difference calculator, and a time synchronization offset compensator. The average time synchronization offset calculator calculates an average time synchronization offset between a phase reference symbol of a time-synchronization acquired frame and phase reference symbols of frames subsequent to the time-synchronization acquired frame. The reference clock frequency difference calculator calculates a reference clock frequency difference between a transmitter and a receiver. The time synchronization offset compensator compensates a time synchronization offset.