| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-loss frequency selection board capable of varying a transmission frequency without a mechanical drive and a complicated wiring structure.SOLUTION: Slots 5 larger than slots 2 cut on the upper surface of a hollow dielectric 1 are cut regularly. At a position in which each of the plurality of regularly cut slots 5 includes each of the plurality of slots 2 on the upper surface of a hollow dielectric 1, there are provided a metal plate 4 stuck on the inner surface of the hollow dielectric 1 and two electrodes 6 placed on the inner wall surface of the hollow dielectric 1 at positions not in contact with the metal plate 4. The electrodes 6 are connected to an external power supply. |
