Wideband Circularly Polarized Antenna with In-Lens Polarizer for High-Speed Communications

Marta Arias Campo, Giorgio Carluccio, Darwin Blanco, Oliver Litschke, Simona Bruni, Nuria Llombart

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
9 Downloads (Pure)


In this contribution, a broadband G-band leaky-wave (LW) fed lens antenna with an integrated dielectric grid polarizer is presented. The proposed wideband polarizer unit cell geometry enables its fabrication at frequencies higher than 100 GHz, presenting high transmission properties and low axial ratio (AR). A quasi-Analytic technique based on multilayer spectral Green's function combined with a numerical Floquet modes' solver is used to optimize the lens aperture efficiency and AR. The proposed technique is validated via full-wave (FW) simulations. A design is proposed in low dielectric permittivity material, achieving FW simulated aperture efficiency higher than 75% over 44% relative bandwidth, and an AR lower than 3 dB over 35% relative bandwidth. The antenna is able to achieve multiple directive circularly polarized (CP) beams when fed by a focal plane array, preserving the AR bandwidth. A prototype has been fabricated and measured, exhibiting an excellent agreement with quasi-Analytic and FW simulations.

Original languageEnglish
Article number9142359
Pages (from-to)43-54
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Issue number1
Publication statusPublished - 2021


  • Circular polarization
  • dielectric gratings
  • leaky-wave (LW)
  • lens antenna
  • polarizer
  • wideband communications


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