Patent ID: 11967757
Assignee: BEIJING UNISTRONG SCIENCE & TECHNOLOGY CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A helical antenna, comprising a printed circuit board and a radiation body arranged on the printed circuit board, wherein the radiation body comprises at least one main helical arm and at least one parasitic helical arm, each main helical arm corresponds to at least one parasitic helical arm, each main helical arm is arranged in parallel with and is spaced with its corresponding parasitic helical arm, wherein,
a first terminal of each main helical arm is electrically connected to a first terminal of the corresponding parasitic helical arm, to form a feed output terminal of the helical antenna;
a second terminal of the main helical arm and a second terminal of the parasitic helical arm are both in a floating state; and
a length of the parasitic helical arm is greater than a length of its corresponding main helical arm, and a helix angle of a part of the parasitic helical arm exceeding its corresponding main helical arm at the second terminal of the parasitic helical arm in the floating state is less than a helix angle of a part of the parasitic helical arm not exceeding its corresponding main helical arm.