| 摘要 |
PURPOSE:To improve the profitability by constituting a waveguide body with a foamed resin made base plate and a conductor layer with a slot, thereby suppressing increase in the transmission loss of a microwave attending on deformation and deterioration. CONSTITUTION:Base plates 12, 22, 32 made of a foamed resin are integrally formed by an injection molding method, a compression forming method or the other resin forming method. After masking for the slot 14 is applied to the prescribed position of the base plate 12, respective conductor layers 13, 23, 33 are formed to the surface of each base plate by the metal plating, the metal vapor-deposition and the conductor material coating, etc. Then the mask is removed from the base plate 12 to obtain a waveguide body. Then power is supplied from a feeding element 21 to a conductor layer 13 with each slot 14 of a radiation element 11 via each coupling section 31, a microwave is transmitted by exciting the inside of the layer 13 in a prescribed mode. Thus, the conductor is made with high accuracy easily by using the existing installation without mechanical deformation, thermal deformation and thermal deterioration and the increase in a transmission loss. |
