Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 1: Laser Technology and Applications (joint session Q/K)

Q 1.5: Talk

Monday, March 10, 2025, 12:00–12:15, HS V

THz frequency combs for traceable 6G channel characterization — •Adam Kuchnia, David Humphreys, Nora Meyne, and Heiko Füser — Physikalisch Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig

Traceable characterization of communication systems operating in the 6G frequency range is currently limited by the availability of measurement equipment traced back to primary SI standards. A solution is provided via photoconductive antennas (PCAs) in combination with THz frequency combs, utilized to directly down-convert free-space THz RF signals to baseband. Traceability is ensured by referencing the THz frequency comb to an atomic clock. Within this work, the PCA antenna performance within the 6G frequency range is investigated. CST-Microwave-Studio-based simulations are performed to analyze existing designs and to suggest optimized structures. Channel characterization is realized by measurement of free-space THz RF signals and analyzing amplitude and phase dependency over a wide frequency range. A comparison to the expected antenna behavior is provided. This approach opens new possibilities for THz measurement, including traceable detection of CW and RF-modulated waveforms and channel sounding.

Keywords: THz frequency combs; photoconductive antenna; 6G channel characterization; traceability