| 摘要 |
PURPOSE:To make a power radiating board free from distortion and bend so as to increase the strength of the board by forming the power radiating board with reinforcing members made of a foamed insulator and united to both surfaces of the board and forming a wave guiding space between the power radiating board and a bottom plate. CONSTITUTION:A power radiating board 1 is formed together with reinforcing members 3 made of a foamed insulator and united to both upper and lower surfaces of the board 1 in one body. Then the board 1 and a bottom plate 2 are fixed by means of fixing members 4 while the board 1 and plate 2 are separated from each other and a circular wave guiding space having a diameter of at least 5lambda is formed of the power radiating board 1, bottom plate 2, and fixing members 4. Therefore, the mass productivity of this discoid line can be improved and the cost can be reduced. |
