Comparison study of 4×4 Butler matrices in microstrip technologies for Ka-band

Francisco Pizarro, David Ramírez-Gil, Astrid Algaba-Brazález, Luis Fernando Herrán-Ontanón, Eva Rajo-Iglesias

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


This article presents the design, construction and performance comparison of three 4×4 Butler matrix technologies working on the Ka-band: standard microstrip, standard microstrip with metasurface packaging and inverted microstrip gap waveguide technology (IM-GWG). Measurement results show that the packaged microstrip and the IM-GWG exhibit less losses, with a good compromise in cost and performance compared to the conventional microstrip Butler matrix.

Original languageEnglish
Article number153248
JournalAEU - International Journal of Electronics and Communications
StatePublished - Jul 2020


  • Butler matrix
  • Gap waveguide
  • Inverted microstrip
  • Microstrip packaged


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