Patent ID: 9472856
Filing Date: 2016-10-18
CPC Classification: H01Q

Claim Text:
1. An antenna, comprising: a power feeding waveguide to which radio waves including a vertical polarized wave and a horizontal polarized wave are transmitted; a sub reflection mirror disposed to face an opening of the power feeding waveguide and configured to reflect the radio waves radiated from the opening; and a main reflection mirror disposed to face the sub reflection mirror and configured to outwardly radiate the radio waves reflected by the sub reflection mirror, wherein a front surface of the main reflection mirror has a shape formed by rotating a line reaching one side and the other side of a predetermined parabola curve at least once, around a rotational axis, wherein a front surface of the sub reflection mirror has a shape formed by rotating a stepped line around the rotational axis, the stepped line being stair shaped and including a series of alternating and connected rise and run pairs, the rises being parallel to the rotational axis and extending from the runs toward the main reflection mirror, the runs being perpendicular to the rotational axis and extending radially outward, and wherein the rises are staggered at differing distances on the sub reflection mirror in a radially outward direction, such that a thickness between each rise and a radial edge of the sub reflection mirror in the radially outward direction is different for each rise on the sub reflection mirror.