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This paper proposes a novel compact dual-band circularly polarized printed quadrifilar helix antenna (PQHA) designed for applications in the BeiDou Navigation Satellite System (BDS). The antenna utilizes a parallel LC circuit to control mutual coupling, enabling two quadrifilar helixes to be wrapped around a single cylindrical dielectric substrate, resulting in a compact form factor. The antenna operates at the B1 (1.561 GHz) and S (2.492 GHz) bands. A series feed network is employed to excite each of the four spiral arms with equal magnitudes and a successive 90° phase difference, achieving axial radiation patterns at both the B1 and S bands. The antenna features two ports, a compact structure, and is easily designed and fabricated. Simulation results demonstrate that the proposed dual-band PQHA achieves a 10 dB return loss bandwidth of 10% at the B1 band and 20.6% at the S band. Additionally, the 3 dB axial ratio bandwidths are 5.2% and 7.1% at the B1 and S bands, respectively. Furthermore, isolation greater than 21 dB is achieved between the two quadrifilar helixes.

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A Novel Compact Dual-Band Printed Quadrifilar Helix Antenna for BDS Application

  • 会议论文

  • 发表日期：

    2026年

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  • Daqiao Liu,
  • Dongjun Wang,
  • Yuan Zhang,
  • Yanting Zhang

摘要

This paper proposes a novel compact dual-band circularly polarized printed quadrifilar helix antenna (PQHA) designed for applications in the BeiDou Navigation Satellite System (BDS). The antenna utilizes a parallel LC circuit to control mutual coupling, enabling two quadrifilar helixes to be wrapped around a single cylindrical dielectric substrate, resulting in a compact form factor. The antenna operates at the B1 (1.561 GHz) and S (2.492 GHz) bands. A series feed network is employed to excite each of the four spiral arms with equal magnitudes and a successive 90° phase difference, achieving axial radiation patterns at both the B1 and S bands. The antenna features two ports, a compact structure, and is easily designed and fabricated. Simulation results demonstrate that the proposed dual-band PQHA achieves a 10 dB return loss bandwidth of 10% at the B1 band and 20.6% at the S band. Additionally, the 3 dB axial ratio bandwidths are 5.2% and 7.1% at the B1 and S bands, respectively. Furthermore, isolation greater than 21 dB is achieved between the two quadrifilar helixes.