| 摘要 |
PURPOSE: A primary radiator having improved receiving efficiency by reducing side lobes is provided to achieve a high receiving efficiency by reducing the side lobes of the radiation pattern. CONSTITUTION: A primary radiator having improved receiving efficiency by reducing side lobes comprises a waveguide(1) having a rectangular cross section, in which one end thereof is open and the other end is a closed surface(1a), and a dielectric feeder(2) which is held inside an opening(1b) of this waveguide(1), with an annular wall(3) being provided outside the opening(1b). Inside the waveguide(1), a first probe(4) and a second probe(9) are provided in such a manner as to be orthogonal to each other, and the distance between these probes(4,9) and the closed surface(1a) is approximately 1/4 of the guide wavelength lambda g, and the two probes(4,9) are connected to a converter circuit.
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