| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a switch for switching the antenna of a radar, etc., in order to secure the transmission of a low cost and a small loss. SOLUTION: This switch consists of a disk type substrate 1 which has a selecting strip line 2 and a fixed substrate 5 which has a cavity part 51 where the substrate 1 is rotatively housed in the part 51 with no contact with the part 51. The substrate 5 includes a circular arc strip line 12 formed at the inside edge of the part 51, an input strip line 11 which is connected to an external input terminal and forms a T branch circuit with the line 12 and the plural output strip lines 15, 16, 17, 18 and 19 which are respectively connected to plural external output terminals. Then the selective electric conduction is secured between a prescribed position of the line 12 through the line 2 and one of lines of 15 to 19 via the line 2.</p> |
