Dual-Polarized mm-Wave End-Fire Chain-Slot Antenna for Mobile Devices

Resti Montoya Moreno, Joni Kurvinen, Juha Ala-Laurinaho, Alexander Khripkov, Janne Ilvonen, Jari van Wonterghem, Ville Viikari

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)
51 Downloads (Pure)


This article describes a dual-polarized endfire antenna array for millimeter-wave (mm-wave) frequencies. The antenna consists of a chain-slot-shaped pattern on a mobile phone metal frame. The antenna is fed using a transmission line, which would cause only a negligible capacitive loading of the sub-6 GHz antenna realized on the same metal frame and, therefore, would not significantly degrade its performance. This makes colocating the sub-6 GHz and mm-wave antennas in the same, shared volume possible. Measurements indicate that a four-element array placed within a mobile phone provides a realized gain between 8 and 12.6 dBi for both polarizations across the entire band from 24.5 to 29.5 GHz. The total efficiency of a single element is better than-2 and-3 dB for the whole band for horizontal and vertical polarizations, respectively.

Original languageEnglish
Article number9119206
Pages (from-to)25-34
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Issue number1
Publication statusPublished - Jan 2021
MoE publication typeA1 Journal article-refereed


  • 5G
  • antenna
  • beam-steering
  • end-fire antenna array
  • metallic rim
  • mm-wave frequencies
  • mobile phone


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