A transparent antenna includes a substrate, an antenna grid layer, and a ground grid layer. The substrate has an electrically conductive hole extending from two opposite surfaced of the substrate. The antenna grid layer is formed on a surface of the substrate. The antenna grid layer includes a feeding portion and a transmission portion. The ground grid layer is formed on another surface of the substrate. The ground grid layer is coupled to the feeding portion of the antenna grid layer via the electrically conductive hole. An offset distance between a projection of a gridline of the antenna grid layer on the first surface and a projection of a gridline of the ground grid layer on the first surface is smaller than or equal to half of a difference between a line width of the antenna grid layer and a line width of the ground grid layer.