High-efficiency and wideband aperiodic array of uniformly excited slotted waveguide antennas designed through compressive sensing

Lei Shi, Carlo Bencivenni, Rob Maaskant, Johan Wettergren, Johan Pragt, Marianna Ivashina (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

A uniformly excited slotted waveguide (WG) antenna array for point-to-point communication is presented. The European Telecommunications Standards Institute class-II sidelobe level requirements are satisfied in all planes at almost all frequencies by the aperiodic arrangement of several parallel ridge WGs in the E-plane, each with a different number of equally spaced radiating slots along the H-plane. Both the optimal separation and number of slots per WG are determined through a compressive sensing approach. This results in 160 slots organized in 16 columns offering 29 dBi peak gain at Ka-band. A dedicated 16-way analog beamforming network is designed to provide the optimal nonuniform and in-phase excitation of the 16 WG channels, thereby compensating for the variable number of slots per column and the phase difference due to the E-plane aperiodicity. The measurements confirm the simulated reflection coefficient and radiation pattern characteristics, as well as the high aperture efficiency (70%-90%) over a 13.6% relative bandwidth (27.5-31.5 GHz) and <2 dB gain variation over 3.75 GHz (12.7%).

Original languageEnglish
Article number8606072
Pages (from-to)2992-2999
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Volume67
Issue number5
DOIs
Publication statusPublished - 1 May 2019

Keywords

  • Aperiodic array
  • compressive sensing
  • irregular array
  • slotted waveguide (WG) antenna

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