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Wireless terahertz communications

: Freude, W.; Harter, T.; Ummethala, S.; Muehlbrandt, S.; Blaicher, M.; Wolf, S.; Weber, M.; Boes, F.; Massler, H.; Tessmann, A.; Kutuvantavida, Y.; Kemal, J.N.; Nellen, S.; Hahn, L.; Globisch, B.; Walther, M.; Zwick, T.; Randel, S.; Koos, C.


Institute of Electrical and Electronics Engineers -IEEE-:
Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 : 23-27 June 2019, Munich, Germany
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-7281-0469-0
ISBN: 978-1-7281-0470-6
Conference on Lasers and Electro-Optics Europe (CLEO Europe) <2019, Munich>
European Quantum Electronics Conference (EQEC) <2019, Munich>
Fraunhofer IAF ()
Fraunhofer HHI ()

Over the past years, interest in wireless THz communications with so-called T-waves has tremendously increased [1]-[4], because the large carrier frequencies in the range 0.2 THz to 0.9 THz support wide signal band-widths and consequently large data rates. Transmission over hundreds of meters and line rates exceeding 100 Gbit/s were demonstrated [5]-[10]. Typical atmospheric losses are 0.2 dB/100 m at 0.2 THz, 0.5 dB/100 m at 0.3 THz, 1.5 dB/100 m at 0.4 THz, and 5 dB/100 m at 0.9 THz. For transmission over a 100 m-distance, however, the unity-gain free-space propagation loss a L=100m dB = 10lg(4πL/λ) 2 = 120dB (λ = 1mm, f = 0.3THz) dominates. To combat this propagation loss, multiple directional antennas with a high gain per sector can be employed at the base station to boost the reach and the data throughput on transmission and reception.