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Conference Papers Year : 2021

Metal-only Reflecting Luneburg Lens Design for Sub-THz Applications

C. Bilitos
  • Function : Author
J. Ruiz-Garcia
  • Function : Author
R. Sauleau
E. Martini
  • Function : Author
S. Maci
  • Function : Author

Abstract

This paper presents a metasurface (MTS) beamformer based on Reflecting Luneburg Lenses (RLLs) operating in the sub-THz range. RLLs consist of two circular parallel plate waveguides (PPWs) vertically stacked. The bottom wall of the lower PPW is loaded with a MTS with an axially symmetric modulation. The wave launched by a primary feed in the bottom PPW is collimated in the top one, so that a plane wave is identically generated for any azimuthal position of the source. The proposed solution uses a bed of nails, wellsuited to fabrication by Si micromachining, to implement the RLL refractive index profile. Simulation results yield a 30%-3dB directivity bandwidth around the center frequency (280 GHz). This device can be used as a beam-former for multi-beam antennas for Earth observation or for front-and back-hauling in beyond 5G wireless.
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Dates and versions

hal-03873175 , version 1 (26-11-2022)

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C. Bilitos, J. Ruiz-Garcia, R. Sauleau, E. Martini, S. Maci, et al.. Metal-only Reflecting Luneburg Lens Design for Sub-THz Applications. 2021 International Symposium on Antennas and Propagation (ISAP), Oct 2021, Taipei, France. pp.1-2, ⟨10.23919/ISAP47258.2021.9614591⟩. ⟨hal-03873175⟩
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