94-GHz Butler Matrix-Integrated Metamaterial SIW Beamforming Array in Glass IPD

Shuping Li, Kun Dong Chiu, Donglin Gao, Chung Tse Michael Wu, Chien Nan Kuo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In this work, we propose a low-profile beamforming array operating in the W-band, which is based on the Butler matrix integrated with substrate-integrated waveguide (SIW) metamaterial (MTM) antennas. The proposed MTM antenna achieves an enhanced bandwidth through the use of multiple resonance modes of the composite right/left-hand (CRLH) structure. The implementation of the proposed arrayd is done using a low-cost glass-based integrated-passive-device (IPD) technology. The microstrip-type Butler matrix with crossover structures is designed, and its bandwidth of 12.8% at the W-band is verified with measurements. Experimental verifications of the radiation patterns are conducted to demonstrate the beamforming characteristics of the proposed IPD antenna array.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
StateAccepted/In press - 2023


  • Antenna arrays
  • Antenna measurements
  • Antenna radiation patterns
  • Antennas
  • Array signal processing
  • Butler matrices
  • Butler matrix
  • Integrated Passive Device (IPD) technology
  • Metals
  • phased array
  • Substrate Integrated Waveguide (SIW)
  • W-band


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