| 摘要 |
PURPOSE:To prevent deterioration of the antenna performance and to attain miniaturization and light weight by providing a waveguide space surrounded by a metallic wall and having a power radiation waveguide face and a feeding part connected to a feeding aperture formed to the waveguide space and mounting an insulator-made reinforcement member from the outside of the power radiation waveguide face. CONSTITUTION:A couple of metallic discs 1, 2 are arranged so as to be opposed mutually with separation and plural slots as power radiation aperture are formed to the metallic disc 1 concentrically or in spiral, then the metallic disc 1 has the power radiation waveguide face. The feeding aperture 2a connected to a coaxial line 3 as the feeding part is formed to the other metallic disc 2. A metallic surrounding wall 4 connecting the circumference edge of the discs 1, 2 is provided and the metallic discs 1, 2 and the metallic surrounding wall 4 form a waveguide space S in its inside. An intermediate metallic plate 6 in parallel with the discs 1, 2 is provided with the wall 4 while leaving a feeding power detour gap D in the space S and the intermediate metallic plate 6 divides the space S into two waveguide spaces S1, S2.
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