| 摘要 |
PURPOSE:To reduce the overall weight with a simple support structure and at the same time to prevent the deterioration of electrical characteristics under the wind pressure for a parabolic antenna, by using a thin and lightweight reflector and also forming a swelled part on the back of the reflector. CONSTITUTION:A thick part 7 is formed at the fringe area on the back of a reflector 5 for reinforcement. This part 7 is unified with a main body 7a and swelled on the back of the reflector. A thick part 8 is formed in the same way as the part 7 in a body with the main body 5a and at the middle part between the center and the fringe of the reflector. This part 8 has 20-10mm. width W and about 7mm. height H. Ribs 9 are arranged radially in a body with the main body 5a and swelled on the back of the reflector. The number of ribs 9 and the spaces between them are decided so as to prevent the distortion of the reflector owing to the wind as well as the strains which are produced in a cooling process after a molding process. Ribs 10 are formed in the same way as ribs 9 and have screw holes 12 at the center of each rib 10. |
