| 摘要 |
PROBLEM TO BE SOLVED: To provide a primary radiator which reduces the length of a necessary dielectric plate and is suitable for reduction in size. SOLUTION: A dielectric plate 3 is fixed to the interior of a first waveguide 1 of a hollow structure, having a full square opening 1a for its one end. Furthermore, this dielectric plate 3 is approximately orthogonal to two sides of the opening 1a in parallel to each other, and a second waveguide having a rectangular section is consecutively formed coaxially for the other end of the first wavelength 1, and a pair of probes 4, 5 projecting in the direction of a center axis from a flat inner wall surface of this second waveguide is set to incline at substantially 45 deg., with respect to the dielectric plate 3.
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