142 GHz Sub-Terahertz Radio Propagation Measurements and Channel Characterization in Factory Buildings

Shihao Ju, Dipankar Shakya, Hitesh Poddar, Yunchou Xing, Ojas Kanhere, Theodore S. Rappaport

Research output: Contribution to journalArticlepeer-review


This paper presents sub-Terahertz (THz) channel characterization and modeling for an indoor industrial scenario based on radio propagation measurements at 142 GHz in four factories. We selected 82 transmitter-receiver (TX-RX) locations in both line-of-sight (LOS) and non-LOS (NLOS) conditions and collected over 75,000 spatial and temporal channel impulse responses. The TX-RX distance ranged from 5 to 87 m. Steerable directional horn antennas were employed at both ends and were switched between vertical and horizontal polarization. Measurements were conducted with the low RX and high RX to characterize the propagation channel for close-to-floor applications such as automated guided vehicles. Results show that the low RXs experience an average path loss increase of 10.7 dB and 6.0 dB at LOS and NLOS locations, respectively. In addition, channel enhancement measurements were conducted using a steerable large flat metal plate as a passive reflecting surface, demonstrating omnidirectional path loss reduction from 0.5 to 22 dB with a mean of 6.5 dB. This paper presents the first statistical channel characterization and path loss modeling at sub-THz frequencies, highlighting the potential for ultra-broadband factory communications in the 6G era.

Original languageEnglish (US)
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Wireless Communications
StateAccepted/In press - 2023


  • 140 GHz
  • 5G
  • 6G
  • Channel Measurement
  • Channel Modeling
  • Indoor Factory
  • Radio Propagation
  • Terahertz

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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