| 摘要 |
PURPOSE:To reduce the loss and increase the transmission power capacity by forming a specific dielectric thin film and an external metallic layer, and then drawing a base material and forming a hollow pipe. CONSTITUTION:An internal metallic layer 4 is formed on the base material 1 to form a specular surface with high smoothness as the surface of the base material, and the dielectric thin film 2 is formed thereupon while having larger adhesive strength than that between the base material 1 and internal metallic layer. Then, the external metallic layer 5 which is thick enough to have mechanical strength and flexibility is formed outside the dielectric thin film 2 and then the base material 1 is drawn having the internal metallic layer 4 stuck to form the hollow pipe. Namely, the surface of the base material with high smoothness is formed as the base material surface not by providing the dielectric thin film 2 directly on the base material 1, but by interposing the internal metallic layer 4. Consequently, the transmission loss is reduced and the power transmission capacity is increased. |
