MANUFACTURE OF WAVEGUIDE

PURPOSE:To obtain a waveguide with light weight without local expansion or exfoliation of a conductor layer by forming a metallic die with electric plating of the conductor layer after applying alumite processing to th surface of aluminum or aluminum alloy, laminating and hardening a prepleg sheet made of a fiber reinforced plastic and solving aud removing the metallic die by an acid or alkali. CONSTITUTION:After both end faces of an aluminum rectangular pipe 1 are sealed by an epoxy group resin, alumite processing 2 is applied to the outer surface and then chemical plating by Cu and electroplating by Ag are applied to form a conductor layer 3, and an adhesive sheet made of an epoxy regin is wrapped on the layer to form a metallic die. A high elastic carbon fiber cloth prepleg sheet 4 is wrapped as a tape on the metallic die, formed by the vacuum pack forming and the aluminum of the metallic die is solved and removed by a solution of 10% NaOH except the sealing member of both end faces. Thus, the die removal between the conductor coating layer and the metallic die transferred and formed on the inner surface is facilitated to avoid the production of expansion or exfoliation.