Helical antenna

A helical antenna comprising:

• a feeder board configured to feed signal and having a top surface;
• and four radiation components electrically coupled with the feeder board, respectively, wherein the four radiation components are spirally surrounded toward a direction away from the feeder board to form a dielectric space, wherein the four radiation components are circularly arranged at intervals, and any cross-section of the four radiation components parallel to the top surface of the feeder board is circular, wherein each of the radiation components comprises:
• a feeding unit comprising a short circuit portion and a feeding portion, wherein an end of the short circuit portion is in connection with the feeder board, wherein the feeding portion is spaced adjacent to a side of the short circuit portion, and an end of the feeding portion is in connection with the feeder board;
• and
• a radiation portion configured to transmit and receive a wireless signal in a first frequency band, wherein an end of the radiation portion is in connection with the short circuit portion, and the other end of the radiation portion is in connection with the feeding portion;
• wherein the radiation portion is a reversed U-shaped multi-segment bending structure;
• wherein the radiation portion comprises a first segment, a first connection part and a second segment, wherein an end of the first segment is in connection with the short circuit portion, and the other end of the first segment is in connection with the first connection part, wherein an end of the second segment is in connection with the feeding portion, and the other end of the second segment is in connection with the first connection part, wherein the first connection part is in connection between the first segment and the second segment;
• and wherein the first segment has a first segment inner side and a first segment outer side, the first connection part has a first connection part inner side and a first connection part outer side, and the second segment has a second segment inner side and a second segment outer side, wherein an end of the first segment inner side is in connection with the short circuit portion, and the other end of the first segment inner side is in connection with the first connection part inner side, wherein an end of the first segment outer side is in connection with the short circuit portion, and the other end of the first segment outer side is in connection with the first connection part outer side, wherein an end of the second segment inner side is in connection with the feeding portion, and the other end of the second segment inner side is in connection with the first connection part inner side, wherein an end of the second segment outer side is in connection with the feeding portion, and the other end of the second segment outer side is in connection with the first connection part outer side, wherein the first segment inner side, the first segment outer side, the second segment inner side and the second segment outer side are parallel to each other, respectively;
• wherein each of the four radiation components further comprises at least one of:
• a first extension portion, wherein the first extension portion is configured to transmit and receive a wireless signal in a second frequency band, wherein the first extension portion is a multi-segment bending structure, an end of the first extension portion is in connection with the first segment of the radiation portion and disposed adjacent to the short circuit portion, and the other end of the first extension portion is a free end;
• and wherein the first extension portion is a L-shape bending structure, and comprises a second connection part and a third segment, wherein an end of the second connection part is in connection with the first segment outer side of the first segment, and the other end of the second connection part is in connection with an end of the third segment, wherein the other end of the third segment is a free end;
• and/or
• a second extension portion, wherein the second extension portion is configured to transmit and receive a wireless signal in a third frequency band, wherein the second extension portion is a multi-segment bending structure, an end of the second extension portion is in connection with the second segment of the radiation portion and disposed adjacent to the feeding portion, and the other end of the second extension portion is a free end;
• and wherein the second extension portion is a reversed L-shape bending structure, and comprises a third connection part and a fourth segment, wherein an end of the third connection part is in connection with the second segment outer side, and the other end of the third connection part is in connection with an end of the fourth segment, wherein the other end of the fourth segment is a free end.