| 摘要 |
PROBLEM TO BE SOLVED: To provide a dual-reflector antenna in which spillover by diffraction at the end of a sub reflector is reduced, and a side lobe level is suppressed as a result. SOLUTION: The dual-reflector antenna is provided with a slit which crosses an intersection line of a polarization plane passing through a circle center on a sub reflector, in a position near the sub reflector peripheral edge and on the intersection line with the polarization plane, and a part of electromagnetic waves with which the sub reflector is irradiated from a primary radiator, is made to pass through the slit and leak to the back side of the sub reflector. A form for excellently suppressing the side lobe level is obtained and set while adjusting the shape, width, length and crossing angle with the polarization plane intersection line, etc., of the slit, so as to offset the electromagnetic waves spilled over by the diffraction from the edge of the sub reflector to the back side by the leakage waves. COPYRIGHT: (C)2009,JPO&INPIT
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