| 摘要 |
PURPOSE: To provide a right and left circular polarization shared receiving device for a low noise converter in which the deterioration of signal separation at an input edge can be improved. CONSTITUTION: In the structure of the input probe of an LNB for right and left linear and circular polarization shared reception, a rectangular microstrip patch 21 whose one side isλg/4 long is provided at the central part of the inside of a ground pattern 20 on a circularly polarized band in which a bead phone should be positioned at the opposite side of a substrate, and four input probes 22-25 are provided so as to be adjacent to each side of the rectangular microstrip patch 21, and each two input probes provided at the adjacent sides of the rectangular microstrip patch 21 are connected. When connecting first and second feeders 18 and 19 with those input probes, the feeders 18 and 19 are connected at a position such that the length of one input probe isλg/4 longer than that of the other probe. |
