Amplifying and phase shifting vertical and horizontal polarized signals for frequency converting satellite broadcast receptions

DETAILED DESCRIPTION Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a frequency converter for reception of satellite broadcasting which is capable of receiving left and right circularly polarized waves of a satellite signal as well as vertically and horizontally polarized waves thereof with no use of a polarized wave converter, and is convenient to use.
In accordance with the present invention, the above object can be accomplished by a provision of a frequency converter for reception of satellite broadcasting, comprising: first through fourth feeding lines, each being disposed perpendicularly to one another and vertically to the center of a patch on which a satellite signal with polarized wave components is electromagnetically focused, to allow vertically and horizontally polarized waves of the satellite signal to be excited thereat; first through fourth first-stage amplifiers connected, respectively, to the first through fourth feeding lines, for blocking or transferring the vertically and horizontally polarized wave signals excited at the first through fourth feeding lines in response to a reception selection control; first and second phase shifting units connected, respectively, to outputs of the first and second first-stage amplifiers, for shifting the vertically and horizontally polarized wave signals by a desired phase in response to the reception selection control, respectively, so that left and right circularly polarized waves can be generated; and signal mixing unit for mixing an output signal from the first phase shifting unit with an output signal from the fourth first-stage amplifier and an output signal from the second phase shifting unit with an output signal from the third first-stage amplifier, mixing the mixed signals again and second-stage amplifying the mixed signal.