| 摘要 |
PROBLEM TO BE SOLVED: To suppress, without enlarging the device, the occurrence of spurious due to the operation in which frequency conversion processing of a whole predetermined frequency range of a millimeter wave band is performed by sharing with a plurality of mixers.SOLUTION: A switch 30 for assigning the output of a filter 21 to mixers 81 and 82 disposed for respective regions including a measuring frequency has a configuration that selectively interconnects, by sliding, a plurality of connection waveguides 61 and 62 disposed between an input waveguide 41 and a plurality of output waveguides 51 and 52. Of the connection waveguides 61 and 62, in a midway of the connection waveguide 62 for connecting, to the input waveguide 41, the mixer 82 corresponding to a region on at least the high band side, a high-pass filter 70 setting the lower limit of the region as a cutoff frequency is formed.SELECTED DRAWING: Figure 1 |
