PURPOSE: To lead radio wave emitted from a primary radiator to a sub- reflecting mirror at a noise at a 1st frequency band and at a low loss at other frequency band lower than the 1st frequency band at a high efficiency by forming plural reflecting mirrors among reflecting mirrors interposed between a main reflecting mirror and the primary radiator with a composite mirror face comprising a non-quadratic surface and a quadratic surface provided at the outside of the non-quadratic surface.
CONSTITUTION: Radio wave whose frequency is f1 emitted from a primary radiator is spherical wave whose curvature center is a phase center 4 of the primary radiator, a length of an optical path from the center up to the upper part of a main reflecting mirror aperture is constant and a phase distribution of the non-quadratic spherical face wave on the main reflecting mirror aperture is uniform. In the quadratic spherical wave distribution on the aperture in the spherical face system having the spherical wave whose center is the center 4 being the radio wave emitted from the center 4 whose frequency is f2 (f2<f1), the radio wave emitted from the center 4 of the primary radiator is led up to a sub-reflecting mirror 2 at a low loss.
| JPH04140907 | ANTENNA SYSTEM |
| JPH01170103 | PHASE OFFSET TYPE OPENING SURFACE ANTENNA |
| JPS5287342 | RADIO WAVE DISPERSION TRANSMISSION DEVICE |
MAKINO SHIGERU
MASUDA TAKENORI
SHIMAWAKI YUTAKA
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