CPC H01Q 3/36 (2013.01) [H01Q 9/0471 (2013.01); H01Q 13/02 (2013.01); H01Q 13/06 (2013.01)] | 19 Claims |
1. An antenna, comprising:
a first substrate;
a base material layer on the first substrate and having a plurality of antenna cavities arranged in an array therein; and
a conductive layer on a sidewall of each of the plurality of antenna cavities, each of the plurality of antenna cavities and the conductive layer on the sidewall thereof forming an antenna unit, wherein
each of the plurality of antenna cavities comprises a first opening, and an aperture of the first opening at a position of the antenna cavity close to the first substrate is smaller than an aperture of the first opening at a position of the antenna cavity away from the first substrate, wherein
each of the plurality of antenna cavities comprises a first cavity and a second cavity in physical contact with the first cavity, the second cavity being closer to the first substrate than the first cavity;
the first cavity comprises a second opening, and the second cavity comprises a third opening;
in a direction pointing from the second cavity to the first cavity, an aperture of the second opening gradually increases, and an aperture of the third opening is constant; and
a difference between the aperture of the second opening at a position of the first cavity in physical contact with the second cavity and the aperture of the third opening is smaller than a first value.
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