| 摘要 |
PURPOSE:To decrease the number of manufacturing processes of a high frequency demultiplexing device by changing the closed surface pitch size of a frequency selective surface plate in the lengthwise direction for each of different divided areas. CONSTITUTION:The grids 9 of a frequency selective surface plate 70 are distributed in three different areas. The rectangular windows of each area are arranged in a brick-lay method with even size of grids 9. These grid sizes are optimum at the center of each area against an incident wave 3 of each area. Therefore the plate 70 is produced just by connecting horizontally the surface plates having pitch sizes of each area in the proper length. This decreases the number of manufacturing processes of a high frequency demultiplexing device. Three and more divided areas are also available. |
