Agile Sub-Terahertz to Terahertz Broadband Time-Domain Photonic Channel Sounder

This paper presents the design and implementation of an agile sub-terahertz (sub-THz) broadband time-domain photonic channel sounder, capable of characterizing wireless propagation channels within the 100 GHz to 500 GHz frequency range. The sounder employs a hybrid architecture that combines photonic carrier generation through heterodyne mixing of continuous-wave lasers locked to a frequency comb, along with electronic components for broadband sounding sequence synthesis and digitization. This design enables precise and tunable carrier frequency generation, overcoming the limitations of traditional electronic-only systems. Experimental evaluations highlight the system's high temporal resolution, phase stability, and broadband performance, including over-the-air calibration and monostatic channel measurements across three sub-THz bands (160 GHz, 300 GHz, and 450 GHz). The results establish the feasibility of the time-domain photonic channel sounder as a powerful and versatile tool for measuring various, widely scattered, and spread sub-THz bands.

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Publication Details

Published
2025-09-16
DOI
https://doi.org/10.1109/wsa65299.2025.11202816
Primary Topic
Photonic and Optical Devices
Type
article
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article

Agile Sub-Terahertz to Terahertz Broadband Time-Domain Photonic Channel Sounder

Garrit Schwanke, Shahram Keyvaninia, Taro Eichler, Colja Schubert et al.
Photonic and Optical Devices
article

Agile Sub-Terahertz to Terahertz Broadband Time-Domain Photonic Channel Sounder

Garrit Schwanke, Shahram Keyvaninia, Taro Eichler, Colja Schubert, Oliver Stiewe, Alper Schultze, Robert B. Kohlhaas, Ronald Freund, Robert Elschner, Michael Peter, Thomas Puppe, Nico Vieweg, Ramez Askar, Wilhelm Keusgen, Milan Deumer, Sebastian Müller, Albrecht Neudecker
article en

Abstract

This paper presents the design and implementation of an agile sub-terahertz (sub-THz) broadband time-domain photonic channel sounder, capable of characterizing wireless propagation channels within the 100 GHz to 500 GHz frequency range. The sounder employs a hybrid architecture that combines photonic carrier generation through heterodyne mixing of continuous-wave lasers locked to a frequency comb, along with electronic components for broadband sounding sequence synthesis and digitization. This design enables precise and tunable carrier frequency generation, overcoming the limitations of traditional electronic-only systems. Experimental evaluations highlight the system's high temporal resolution, phase stability, and broadband performance, including over-the-air calibration and monostatic channel measurements across three sub-THz bands (160 GHz, 300 GHz, and 450 GHz). The results establish the feasibility of the time-domain photonic channel sounder as a powerful and versatile tool for measuring various, widely scattered, and spread sub-THz bands.

Rohde & Schwarz (Germany) (DE), Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (DE), Toptica Photonics (Germany) (DE), Technische Universität Berlin (DE)
Openalex Percentile: Top 70%
Photonic and Optical Devices
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