Dual polarising frequency down converter for satellite pick-up antenna

The utility model relates to a frequency reducing device for receiving satellite image signals, which is composed of two metal probes which are mutually perpendicular with a distance of a quarter of wave length and a feed wave polarization selector, wherein, the feed wave polarization selector which is composed of two metal probes which are mutually perpendicular with a distance of a quarter of wave length and two screw columns which are positioned on the same plane and can be moved. One screw column is parallel to one probe, and the other screw column is perpendicular to the other probe. The utility model is used for receiving image signals of a satellite in the horizontal direction and in the vertical direction, and difference frequency output signals which are obtained after the image signals are divided into two paths through a first amplifier, a filter, a frequency mixer, an oscillator and a second amplifier. Then, image signals in the horizontal direction and in the vertical direction can be received by a television receiver.