Design of a multi-layer structure of a bifilar helical antenna

Based on the design experience of traditional helical antenna and multi-layer PCB structure, a multi-layer PCB bifilar helical antenna that works in C band is proposed in this paper. The antenna is composed of several symmetrical metal arcs, which are distributed on different layers and connected by plated via-holes. Meanwhile, the design and the simulation results are given in the paper. The results show that the antenna has low profile, circularly polarized radiation and better impedance matching, providing a novel solution for the design of multi-layer structure antenna.