Compact millimeter-wave switched-beam antenna arrays for short range communications

A. T. Alreshaid, M. S. Sharawi*, Symon Podilchak, K. Sarabandi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
175 Downloads (Pure)


The need for more data throughput is a requirement that will keep growing in future wireless standards, and during the past few years, millimeter-wave technology has generated much excitement in the mobile and wireless communications sectors due to the large bandwidth it can offer. In this letter two different travelling-wave, slot antenna arrays are proposed which can offer tunable switched-beam capability at millimeter-wave frequencies. The antenna systems are built on a single layer PCB with top- and bottom-side etching for operation at 28 GHz with at least 0.7 GHz of measured impedance bandwidth. For the first design, a planar 2 × 4 slot antenna array is proposed while the second design is implemented using a 4 × 4 slot array to demonstrate improved beam directivity. A Butler matrix for simple beam switching in the far-field is also integrated within the compact antenna structure to provide the needed phased array operation. The total size of the two proposed systems with their feed networks are 55.2 × 55 × 0.13 mm3 and 53.7 × 61.2 × 0.13 mm3, respectively. These new travelling-wave switched beam arrays can be placed within current handheld mobile devices for high bandwidth short range communications enabling 5G technologies.

Original languageEnglish
Pages (from-to)1917-1921
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number8
Early online date27 May 2016
Publication statusPublished - Aug 2016


  • 5G
  • Butler beam-forming network
  • millimeter-wave
  • slot antenna
  • switched beam
  • traveling-wave antenna

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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