| CPC H01Q 21/065 (2013.01) [H01Q 1/246 (2013.01); H01Q 1/52 (2013.01); H01Q 9/045 (2013.01)] | 20 Claims |

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1. An antenna device comprising:
a substrate including a first dielectric layer and a second dielectric layer disposed on the first dielectric layer, wherein the first dielectric layer includes a first portion which is an air layer, and
wherein the second dielectric layer includes a second portion overlapping with the first portion;
at least one antenna element disposed on the substrate; and
a feeding line configured to feed power to the at least one antenna element,
wherein the feeding line is disposed on the second portion of the second dielectric layer to overlap with at least a portion of the first portion of the first dielectric layer.
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