The invention discloses a very-low-profile cylindrical Luneberg lens antenna based on a novel
dielectric filling mode. The very-low-profile cylindrical Luneberg lens antenna comprises a cylindrical Luneberg lens, an arc feed source array (1) and an arc metallic reflection baffle plate (2), wherein the cylindrical Luneberg lens is arranged between an upper
metal cover plate (3) and a lower
metal cover plate (4), the arc feed source array (1) is arranged on a
focal line of the cylindrical Luneberg lens, the arc metallic reflection baffle plate (2) is arranged on a non-
radiation aperture of the cylindrical Luneberg lens, the cylindrical Luneberg lens comprises an upper filling
dielectric piece (6) and a lower filling
dielectric piece (5) which have different radii, n
layers of through holes (21) and m
layers of through holes (21) which have different distribution densities are respectively arranged on the upper filling dielectric piece (6) and the lower filling dielectric piece (5) from circle centers towards theoutside, m is larger than n, and the effective dielectric constants of the front n
layers of two dielectric pieces are correspondingly the same. The very-low-profile cylindrical Luneberg lens antenna is simple to process, low profile and light weight are achieved, and the very-low-profile cylindrical Luneberg lens can be used for a multi-beam directional communication and
beam scanning antenna better, particularly for
millimeter-wave
high frequency bands and application occasions requiring axial arraying.