Antenna device comprising one or more antennas, and a feeding element configured to feed a feeding signal to the one or more antennas. An antenna includes a substrate, a first patch arranged on a first layer of the substrate, and a second patch arranged on a second layer of the substrate substantially parallel to the first layer, wherein the first patch and the second patch have a different size and/or are offset with respect to each other in a direction substantially parallel to the first and second layers.