How many beams does sub-THz channel support

Pekka Kyosti, Mar Francis De Guzman, Katsuyuki Haneda, Nuutti Tervo, Aarno Parssinen

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
96 Downloads (Pure)


Antenna, radio frequency (RF) circuit, algorithm, and system researchers on sub-THz RF are interested in knowing characteristics of corresponding radio channels. Among other things, a relevant question is the number of beams supported by the channel. From wideband directional propagation measurements one can estimate how many significant paths are present in a measurement location, but interpreting that to separable beams is not trivial. In this letter, we introduce three methods to approximate the number of beams that a measured power angular delay profile can support. We show also example evaluations and distribution functions of beam numbers, estimated from indoor D-band measurement data.

Original languageEnglish
Pages (from-to)74-78
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Issue number1
Early online date2021
Publication statusPublished - Jan 2022
MoE publication typeA1 Journal article-refereed


  • Antenna measurements
  • beam
  • Directive antennas
  • Dynamic range
  • Frequency measurement
  • Gain
  • measurements
  • Phased arrays
  • Propagation
  • Radio frequency
  • terahertz


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