Polarizer rotating device for multi polarized satellite signal and satellite signal receiving apparatus having the same

摘要

There are provided a polarizer rotating device and a satellite signal receiving apparatus having the same. The satellite signal receiving apparatus includes a feedhorn that receives a satellite signal; a low noise block down converter that processes the signal received by the feedhorn; a skew compensating device that is provided at the low noise block down converter or the feedhorn and rotates the low noise block down converter or the feedhorn to compensate for a skew angle when the satellite signal received by the feedhorn is a linearly polarized wave; a polarizer that receives a linearly polarized signal and a circularly polarized signal of the satellite signal; and a polarizer rotating device that rotates the polarizer when the satellite signal received by the polarizer is a circularly polarized wave. In such a simple structure, the linearly polarized wave and the circularly polarized wave are all received to be processed.

主权项

1. A satellite signal receiving apparatus, comprising:
a feedhorn that receives a satellite signal; a low noise block down converter that processes the satellite signal received by the feedhorn; a skew compensating device that is provided at the low noise block down converter or the feedhorn and rotates the low noise block down converter or the feedhorn to compensate for a skew angle when the satellite signal received by the feedhorn is a linearly polarized wave; a polarizer that is provided within a single waveguide to be rotated relative to the single waveguide and receives a linearly polarized signal and a circularly polarized signal of the satellite signal; and
a polarizer rotating device that rotates the polarizer when the satellite signal received by the polarizer is a circularly polarized wave, and includes a polarizer rotating part that rotates the polarizer by a predetermined angle in a circumferential direction of the single waveguide, wherein the polarizer includes a feedhorn connecting part that has a cylindrical shape and is provided within the single wave wide to be rotated relative to the single waveguide and is communicatively connected to the feedhorn; a polarized wave forming part that is formed at an inner surface of the feedhorn connecting part in a longitudinal direction of the feedhorn connecting part; and a driven part that is formed at one end of the feedhorn connecting part to receive a driving power of the polarizer rotating part.