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2023, Volume 24, Issue 4

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Frontiers of Information Technology & Electronic Engineering >> 2023, Volume 24, Issue 4 doi: 10.1631/FITEE.2200290

Frequency–angle two-dimensional reflection coefficient modeling based on terahertz channel measurement

Affiliation(s): State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China; China Mobile Research Institute, Beijing 100053, China; less

Received: 2022-07-05 Accepted: 2023-05-06 Available online: 2023-05-06
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Abstract

Terahertz (THz) channel propagation characteristics are vital for the design, evaluation, and optimization of THz communication systems. Moreover, reflection plays a significant role in channel propagation. In this correspondence, the reflection coefficients of the THz channel are researched based on extensive measurement campaigns. First, we set up the THz channel sounder from 220 to 320 GHz at incident angles ranging from 10◦ to 80◦. Based on the measured propagation loss, the reflection coefficients of five building materials, i.e., glass, tile, board, plasterboard, and aluminum alloy are calculated separately for frequencies and incident angles. It is found that the lack of THz-relative parameters leads to an inability to successfully fit the Fresnel model of nonmetallic materials to the measurement data. Thus, we propose a frequency–angle two-dimensional reflection coefficient (FARC) model by modifying the Fresnel model with the Lorenz and Drude models. The proposed model characterizes the frequency and incident angle for reflection coefficients and shows low root-mean-square error (RMSE) with the measurement data. Generally, these results are useful for modeling THz channels.

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