| 摘要 |
PURPOSE:To realize the reception of a different frequency band by outputting either of IF signals converted by 1st and 2nd RF converters selectively via a changeover means. CONSTITUTION:When a 1st circularly polarized wave (12GHz) is inputted to a horn 11 via a reflecting mirror (not shown in figure), the wave is converted into a linearly polarized wave by a 1st circularly polarized wave device 12a and inputted to a 1st RF converter 13 via a 1st pickup probe 12b. An RF converter 13 converts the inputted linearly polarized wave into an IF frequency to generate an IF signal, which is outputted to a fixed contact (a) of a changeover switch 17. When a 2nd circularly polarized wave (22GHz) is inputted to the horn 11, the wave is converted into an elliptically polarized wave, transmits through the probe 12b and converted into a linearly polarized wave by a 2nd circularly polarized wave 15a and inputted to a 2nd RF converter 16 via a 2nd pickup probe 15b. The RF converter 16 generates the IF signal and is outputted to a fixed contact (b) of the changeover switch 17. |
