Broadband antenna, multiband antenna unit and antenna array

A multiband antenna unit, comprising at least one first broadband antenna and at least one second broadband antenna arranged above or below said first broadband antenna;

• and further comprising at least one planar parasitic element arranged between said first and second broadband antennas, said first broadband antenna comprising:
• a conductive plate, said plate comprising four slots arranged in a rotation symmetrical manner in said plate, each slot of the said four slots extending from a circumference of said plate towards a rotational symmetry center of the plate;
• four guiding means, each guiding means connected to the plate in one feeding termination point associated with one slot of the four slots;
• wherein:
• a first pair of the feeding termination points is associated with a first pair of oppositely arranged slots of the said four slots;
• a second pair of the feeding termination points is associated with a second pair of oppositely arranged slots of the said slots;
• and
• the feeding termination points is arranged on a same surface of the plate such that:
• a first feeding termination point of each said pair of feeding termination points is offset from its associated slot in a first circumferential direction;
• and
• a second feeding termination point of each said pair of feeding termination points is offset from its associated slot in a circumferential direction that is opposite to the said first circumferential direction.