| 摘要 |
The objectives of this disclosure are: to reduce the size, from among the sizes of a pattern disposed on an obverse surface of a dielectric substrate, in a direction along a wide-wall surface cross section of a waveguide tube, in a waveguide tube/transmission line converter; to reduce the separation between adjacent rows of antenna elements, in an antenna device; and, with regard to directionality of an array antenna formed by means of the antenna elements that form each row, to adjust in particular phase information of each antenna element in order to reduce the likelihood that grating lobes will occur when a beam is scanned over a wide angle. In this disclosure, inadvertent emission of electromagnetic waves is prevented by arranging that a waveguide tube 11 extends on the inside of a dielectric substrate 13, and that metal members 15 for holding a short-circuiting metal layer 14 at the same potential as the waveguide tube 11 remain along the two wide-wall surface cross sections of the waveguide tube 11, and are removed along the two short-wall surface cross sections of the waveguide tube 11. |
