A multiband antenna comprising: a base plate; a housing, comprising a base portion and a cover, removably mounted on the base plate, the cover having a footprint of a first arm and a second arm joined at a central junction; an application-specific antenna mounted on the base plate at the junction of the first arm and the second arm of the cover; two cellular network antennas mounted on the base plate respectively in each of the first and second arms of the cover; wherein the cover comprises a continuous supporting wall and an upper portion, the continuous supporting wall extending between the base portion and the upper portion and having a maximum height (h) and the upper portion extending from the junction along the first and the second arms at the maximum height (h) of the supporting wall and being inclined to form a valley extending between the first and the second arms from proximate the junction to the base portion distal from the junction, wherein a Global Navigation Satellite System, GNSS, receiver is fixed to the base plate in between the two cellular network antennas, and wherein the base plate has two opposing short sides and two opposing long sides forming an outer rectangle, and four fixation means, wherein the four fixation means are located such that they coincide with the corners of an inner rectangle smaller than the outer rectangle, and wherein when the base plate is divided into two halves (8, 9) by a half-line connecting the mid-points on the two opposing long sides, two of the fixation means are located on a first half of the base plate and two of the fixation means are located on a second half of the base plate, characterised in that the application-specific antenna is mounted on the second half of the base plate and the two cellular network antennas and the GNSS receiver are mounted on the first half of the base plate. a base plate; a housing, comprising a base portion and a cover, removably mounted on the base plate, the cover having a footprint of a first arm and a second arm joined at a central junction; an application-specific antenna mounted on the base plate at the junction of the first arm and the second arm of the cover; two cellular network antennas mounted on the base plate respectively in each of the first and second arms of the cover; wherein the cover comprises a continuous supporting wall and an upper portion, the continuous supporting wall extending between the base portion and the upper portion and having a maximum height (h) and the upper portion extending from the junction along the first and the second arms at the maximum height (h) of the supporting wall and being inclined to form a valley extending between the first and the second arms from proximate the junction to the base portion distal from the junction, wherein a Global Navigation Satellite System, GNSS, receiver is fixed to the base plate in between the two cellular network antennas, and wherein the base plate has two opposing short sides and two opposing long sides forming an outer rectangle, and four fixation means, wherein the four fixation means are located such that they coincide with the corners of an inner rectangle smaller than the outer rectangle, and wherein when the base plate is divided into two halves (8, 9) by a half-line connecting the mid-points on the two opposing long sides, two of the fixation means are located on a first half of the base plate and two of the fixation means are located on a second half of the base plate, characterised in that the application-specific antenna is mounted on the second half of the base plate and the two cellular network antennas and the GNSS receiver are mounted on the first half of the base plate.