PROBLEM TO BE SOLVED: To provide a radio wave lens in which waterproofness with respect to the adhesion of rain water, snow and ice in the case of flat installation is improved by enhancing structures of a reflecting plate and a lens cover in the radio wave lens employing a Luneberg lens, and a radio wave lens antenna system.;SOLUTION: The present invention relates to a radio wave lens comprising: a semi-spherical Luneberg lens; a radio wave reflecting plate larger than a lens diameter and combined with the Luneberg lens for reflecting a radio wave; and a lens cover covering the Luneberg lens and the radio wave reflecting plate as a whole. The radio wave lens is characterized in that the radio wave reflecting plate has an integrated structure having a step in an outer circumferential portion to mount the lens cover thereto, the radio wave reflecting plate and the lens cover are fixed in the outer circumferential portion using a fixer or sandwiched using a cover presser, and a seal structure is formed between the radio wave reflecting plate and the lens cover.;COPYRIGHT: (C)2009,JPO&INPIT
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