two antenna units comprising two feeding ends, two first radiators extending from the two feeding ends, and two second radiators extending from the two feeding ends;

two isolation members disposed between the two antenna units and comprising two first portions adjacent to each other and two second portions adjacent to the two second radiators; and

a grounding member disposed beside the two antenna units and the two isolation members, wherein the two second radiators and the two second portions are connected to the grounding member, a first slot is formed among each first radiator, the corresponding second radiator, and the grounding member, a second slot is formed between each first radiator and the corresponding second radiator, a third slot is formed between each second radiator and the corresponding second portion, and a fourth slot is formed between the two first portions,

the two antenna units and the two isolation members are mirrored by the fourth slot, and the two first portions have widths gradually changing along an extending direction of the fourth slot,

wherein each of the second radiators comprises a fourth section, a fifth section, a sixth section, and a seventh section that are sequentially connected, the fourth section extends from the feeding end, the seventh section is connected to the grounding member, and the first slot is formed between the fourth section and the grounding member and between the fifth section and the seventh section.