An antenna arrangement on a circuit board extending along a length direction, L, and a width direction, W, the width direction being orthogonal to the length direction, the antenna arrangement comprising: a cell-band antenna; a ground plane associated with the cell-band antenna; and a slit antenna arranged in a slit antenna portion of the ground plane, the slit antenna comprising a slit in the ground plane, the slit having in the width direction a slit extension extending from an in the length direction extending edge of the ground plane, the slit extension being 50-95% of an in the width direction extending total width of the slit antenna portion, wherein the cell-band antenna and the slit antenna are arranged on, in the length direction, opposite side portions of the circuit board, wherein the ground plane comprises a cell-band antenna connection portion and an in the length direction and in the width direction extending mid portion, wherein the cell-band antenna has a connection to the ground plane at the cell-band antenna connection portion, and the mid portion is arranged between the cell-band antenna and the slit antenna, the mid portion having in the width direction a mid portion extension extending from the edge of the ground plane, the mid portion extension being smaller than the slit extension, characterized in that the slit antenna portion and the cell-band antenna connection portion are exclusively electrically connected to each other by the mid portion. a cell-band antenna; a ground plane associated with the cell-band antenna; and a slit antenna arranged in a slit antenna portion of the ground plane, the slit antenna comprising a slit in the ground plane, the slit having in the width direction a slit extension extending from an in the length direction extending edge of the ground plane, the slit extension being 50-95% of an in the width direction extending total width of the slit antenna portion, wherein the cell-band antenna and the slit antenna are arranged on, in the length direction, opposite side portions of the circuit board, wherein the ground plane comprises a cell-band antenna connection portion and an in the length direction and in the width direction extending mid portion, wherein the cell-band antenna has a connection to the ground plane at the cell-band antenna connection portion, and the mid portion is arranged between the cell-band antenna and the slit antenna, the mid portion having in the width direction a mid portion extension extending from the edge of the ground plane, the mid portion extension being smaller than the slit extension, characterized in that the slit antenna portion and the cell-band antenna connection portion are exclusively electrically connected to each other by the mid portion. wherein the cell-band antenna and the slit antenna are arranged on, in the length direction, opposite side portions of the circuit board, wherein the ground plane comprises a cell-band antenna connection portion and an in the length direction and in the width direction extending mid portion, wherein the cell-band antenna has a connection to the ground plane at the cell-band antenna connection portion, and the mid portion is arranged between the cell-band antenna and the slit antenna, the mid portion having in the width direction a mid portion extension extending from the edge of the ground plane, the mid portion extension being smaller than the slit extension, characterized in that the slit antenna portion and the cell-band antenna connection portion are exclusively electrically connected to each other by the mid portion.