| 摘要 |
PROBLEM TO BE SOLVED: To provide a primary radiator which is preferable to miniaturization and the cost of which is reduced. SOLUTION: A dielectric feeder 2 in which a radiating section 4, an impedance conversion section 5 and a phase conversion section 6 are formed integrally is held to a wave guide 1, and the radiating section 4 is projected from the opening end of the wave guide 1 while the phase conversion section 6 is crossed at an angle of approximately 45 deg. to a probe 3 in the wave guide 1. A pair of curved surfaces 5a converging towards the phase conversion section 6 from the radiating section 4 are formed to the impedance conversion section 5, and the thickness of the dielectric feeder 2 is converged so as to be gradually thinned towards the phase conversion section 6 from the radiating section 4 by forming the sectional shapes of these curved surfaces 5a in an approximate secondary curve.
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