Antenna structure and communication device

A communication device, comprising:

• an antenna structure, comprising:
• a first radiator, comprising a first section, a second section, and a third section, wherein the first section comprises a feed-in end, the second section is adjacent to the first section and is connected to a position of the first section close to the feed-in end, and the third section is connected to the second section and the feed-in end to encircle a space;
• and
• a second radiator, disposed around the first section and the second section, and comprising a first end and a second end opposite to each other, wherein the first end is a ground end, a coupling interval is formed between the second end and the third section, and a first frequency band, a second frequency band, and a third frequency band are resonated by the first radiator and the second radiator;
• an antenna-plexer, connected to the antenna structure and comprising a first filter unit, a second filter unit, a third filter unit, a fourth filter unit, a fifth filter unit, and a switch unit, wherein the switch unit is connected to the fifth filter unit;
• a first chip, connected to the first filter unit, the second filter unit, the third filter unit, and the switch unit;
• and
• a second chip, connected to the fourth filter unit and the switch unit, wherein the switch unit is switchably connected to the first chip or the second chip.

A communication device, comprising:

• two antenna structures, wherein the two antenna structures are spaced by a first distance, and each of the two antenna structures comprises:
• a first radiator, comprising a first section, a second section, and a third section, wherein the first section comprises a feed-in end, the second section is adjacent to the first section and is connected to a position of the first section close to the feed-in end, and the third section is connected to the second section and the feed-in end to encircle a space;
• and
• a second radiator, disposed around the first section and the second section, and comprising a first end and a second end opposite to each other, wherein the first end is a ground end, a coupling interval is formed between the second end and the third section, and a first frequency band, a second frequency band, and a third frequency band are resonated by the first radiator and the second radiator;
• and
• an isolation element, disposed between the two antenna structures and spaced from each of the antenna structures by a second distance.