An antenna element for a multi-band antenna device, the antenna element comprising: a dielectric body provided with one or more metal layers, the dielectric body comprising a base plate and one or more wall elements arranged on the base plate and formed integrally with the base plate and/or protruding from the base plate ; one or more first radiating elements arranged on the base plate , each first radiating element being configured to radiate in a first frequency band; one or more second radiating elements arranged on the base plate , each second radiating element being configured to radiate in a second frequency band; a first feeding network connected to the one or more first radiating elements , for operating the one or more first radiating elements as a first antenna array; and a second feeding network connected to the one or more second radiating elements , for operating the one or more second radiating elements as a second antenna array; wherein the first feeding network is provided, at least partly, as a metal layer of the one or more metal layers on the one or more wall elements ; wherein: the one or more wall elements comprise an outer wall element , which extends along the edges of the base plate , and one or more inner wall elements , each inner wall element connecting the outer wall element to one of the one or more first radiating elements , a part of the first feeding network is provided as a metal layer of the one or more metal layers on the outer wall element , and a part of the first feeding network is provided as a metal layer of the one or more metal layers on the inner wall elements . a dielectric body provided with one or more metal layers, the dielectric body comprising a base plate and one or more wall elements arranged on the base plate and formed integrally with the base plate and/or protruding from the base plate ; one or more first radiating elements arranged on the base plate , each first radiating element being configured to radiate in a first frequency band; one or more second radiating elements arranged on the base plate , each second radiating element being configured to radiate in a second frequency band; a first feeding network connected to the one or more first radiating elements , for operating the one or more first radiating elements as a first antenna array; and a second feeding network connected to the one or more second radiating elements , for operating the one or more second radiating elements as a second antenna array; wherein the first feeding network is provided, at least partly, as a metal layer of the one or more metal layers on the one or more wall elements ; wherein: the one or more wall elements comprise an outer wall element , which extends along the edges of the base plate , and one or more inner wall elements , each inner wall element connecting the outer wall element to one of the one or more first radiating elements , a part of the first feeding network is provided as a metal layer of the one or more metal layers on the outer wall element , and a part of the first feeding network is provided as a metal layer of the one or more metal layers on the inner wall elements . the one or more wall elements comprise an outer wall element , which extends along the edges of the base plate , and one or more inner wall elements , each inner wall element connecting the outer wall element to one of the one or more first radiating elements , a part of the first feeding network is provided as a metal layer of the one or more metal layers on the outer wall element , and a part of the first feeding network is provided as a metal layer of the one or more metal layers on the inner wall elements . <EOS>