Method for coupling a signal and an antenna structure

An antenna unit, which comprises

• an antenna structure, which antenna structure comprises a first antenna element for receiving or transmitting information, a second antenna element for receiving or transmitting information, a ground plane for grounding the antenna structure, a coupling line for coupling the first antenna element and the second antenna element to each other, and a feeding line for feeding the antenna structure through one feeding point, wherein the antenna structure is manufactured on an insulating material, which has a base, as well as at least one wall region, which wall region reaches in a direction deviating from the base and which shape of the antenna structure follows the shapes of the base and the wall region, and the first antenna element of the antenna structure is a microstrip antenna and is located next to the ground plane and perpendicular to the ground plane and the second antenna element is a microstrip antenna and is located above the ground plane and parallel to the ground plane.

A mobile station, which comprises

• a first antenna element for receiving or transmitting information, a second antenna element for receiving or transmitting information, a ground plane for grounding the antenna structure, a coupling line four coupling the first antenna element and the second antenna element to each other, and a feeding line for feeding the first and second antenna elements through one feeding point, wherein the first antenna element is a microstrip antenna and is located next to the ground plane and perpendicular to the ground plane and the second antenna element is a microstrip antenna and is located above the ground plane and parallel to the ground plane.