Application of a two-dimensional butler matrix antenna array for tile-based beamforming

Cheng-Hung Hsieh, Yi Ting Lin, Hsaing Chieh Jhan, Zuo-Min Tsai *

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review


This paper proposes a new two-dimensional (2D) Butler matrix antenna array with 16 switching beams for tile-based beamforming. This study fabricated and assembled a 3.5-GHz Butler switching antenna array using multilayer Rogers printed circuit board technology. It adopted a new design concept and layer-by-layer vertical connection architecture. This 2D Butler matrix antenna array does not require long coaxial cables to connect functional circuit interfaces, which is an improvement over the traditional Butler matrix beamforming network (BFN) antenna array and may facilitate considerable reductions in circuit volume and complexity.

Original languageEnglish
Article number20190272
JournalIEICE Electronics Express
Issue number11
StatePublished - 10 Jun 2019


  • Antenna array
  • Antenna feeds
  • Butler matrices
  • Microwave
  • Multilayer printed circuit board technology
  • Tile-based beamforming

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