| 摘要 |
<p>A polarization control network for reception of satellite broadcasting, comprises first to fourth feeding lines disposed perpendicularly to one another and to the center of a patch on which a satellite signal with polarized wave components is electromagnetically focused. First to fourth first-stage low noise amplifiers are connected, respectively, to the first to fourth feeding lines, for blocking or transferring the vertically and horizontally polarized wave signals excited at the first to fourth feeding lines in response to a reception selection control. First and second phase shifters shift 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. A signal mixing circuit mixes the output signals from the first phase shifter and from the fourth first-stage amplifier and the ouptut signal from the second phase shifter and from the third first-stage amplifier, then the mixed signals. <IMAGE></p> |
