| 摘要 |
PURPOSE:To improve the strength and radio wave collection efficiency of the parabolic antenna, to prevent its radio wave reflecting surface from deteriorating owing to heat, light, etc., and to eliminate a decrease in the radio wave collection efficiency by forming a synthetic resin reinforcing layer capable of radio wave transmission on the radio wave incidence surface of a radio wave reflecting specular layer and a film with good weather resistance on the surface of the synthetic resin reinforcing layer. CONSTITUTION:Synthetic resin reinforcing layers 2 and 3 are provided on both surfaces of the radio wave reflecting specular layer 1. The electric wave reflecting specular layer 1 is made of metallic foil, metallic netting, metallic fiber, etc., and has radio wave reflectivity. Namely, the synthetic resin reinforcing layers 2 and 3 are provided to both surfaces of the radio wave relfecting specular surface layer 1 to reinforce the layer 1, and those synthetic resin reinforcing layers are made of a variety of synthetic resin. In this case, the synthetic resin reinforcing layer 2 capable of radio wave transmission is provided to the concave curved surface of the radio wave reflecting specular layer 1, i.e. radio wave reflecting surface. The synthetic resin material which transmits a radio wave uses polyester resin, epoxy resin, etc. Further, the film 4 with excellent weather resistance is provided to the top surface of the synthetic resin reinforcing layer 2. The film 4 uses a film made of acrylic resin, ABS resin, vinyl chloride resin, etc. |
