A Simple Method to Design Wideband Circularly Polarized Spherical Multibeam Luneburg Lens Antenna

Siyuan Lei, Gao Wei, Kangkang Han, Xianlei Li, Tiancheng Qiu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

This letter presents a simple method to design the wideband circularly polarized spherical multibeam Luneburg lens (LL) antenna by using three-dimensional (3-D)-printing. The conventional 3-D-printed spherical LL is divided into many cells and each cell is filled by the unit cell with different filling ratios, which breaks the circular symmetry of the LL. The proposed method divides the LL into many layers, and the profile surface equation of each layer is calculated by the ordinary least square method to keep the rotation symmetry of the LL. Then, according to the proposed circularly polarized implement method, the transformation of linear polarization to circular polarization can be realized by selecting a proper radius of LL. The simulated and measured results show that the axial ratios of the proposed multibeam LL antenna are less than 3 dB with good impedance performance and more than 13.8 dBi gain in a relative bandwidth of 31.6%, which demonstrates the validity and simplicity of the presented method.

Original languageEnglish
Pages (from-to)1423-1427
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Volume21
Issue number7
DOIs
StatePublished - 1 Jul 2022

Keywords

  • Circularly polarized antenna
  • Luneburg lens (LL)
  • three-dimensional (3-D)-printing
  • wideband multibeam antenna

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