An antenna device comprising a base plate, a first radiator, a first balun and a second
radiator. The base plate having a substantially planar shape. The first radiator is configured
to radiate a first electromagnetic signal in a first frequency band. The first balun extends
along a first axis between the base plate and the first radiator. The first axis is oriented
perpendicular to the base plate and the first radiator. The first balun is arranged in order to
support the first radiator. The second radiator is configured to radiate a second …