Journal ArticleDOI
Link Budget Analysis for Terahertz Fixed Wireless Links
TLDR
High data rates can only be transmitted via these links if transmitter and receiver antennas with very high gains are used, and this requires an adaptive control of mechanical fluctuations.Abstract:
Due to the broad bandwidths, terahertz (THz)-waves offer the possibility for wireless transmission of high data rates. Especially, broadband wireless access over short ranges and fixed wireless links based on THz-waves are very promising. They can be incorporated as a bridge for optical networks or an alternative for the connection of wireless stations in difficult environments, to transmit next generation HDTV signals or for the broadband connection of servers in a data center, for instance. The frequency range between 300 and 900 GHz is very promising for these applications since the possible bandwidth is very high and first electronic circuits will become available on the market soon. However, contrary to wireless links in the lower GHz-bands, the free-space path-loss is quite high and the attenuation due to molecules in the air or water droplets can significantly decrease the transmittable data rates in this frequency range. Here the basic properties of THz-waves will be investigated and the maximum achievable data rates for fixed wireless THz-links will be derived. In order to keep the considerations as general as possible, the derivations are based on simple assumptions and equations. Additionally, conclusions for the applicability of THz-waves for fixed wireless links with distances up to 1 km will be given and the special requirements for these systems will be discussed. As we will show, high data rates can only be transmitted via these links if transmitter and receiver antennas with very high gains are used. This requires an adaptive control of mechanical fluctuations.read more
Citations
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Proceedings ArticleDOI
Comparison of Diffuse Roughness Scattering from Material Reflections at 500-750 GHz
Demos Serghiou,Mohsen Khalily,S. Johny,M. Stanley,I. Fatadin,Tim Brown,N. Ridler,Rahim Tafazolli +7 more
TL;DR: In this paper, an ultra-wideband Terahertz (THz) channel measurement campaign in the 500-750 GHz frequency band is presented, where the signal losses due to absorption and diffuse scattering from the rough surface of each Material Under Test (MUT) are calculated.
Capacity Analysis of Opto-Electronic THz Earth-Satellite Links
TL;DR: In this paper, the feasibility of establishing geostationary-satellite-to-earth station (GEO-ES) links in the THz bands with relatively low atmospheric loss was theoretically analyzed.
Vegetation Loss at D-Band Frequencies and New Vegetation-Dependent Exponential Decay Model
TL;DR: In this article , the average loss per meter vegetation depth (VD) for different vegetation types at millimeter wave frequencies was determined for different types of vegetation, including trees, hedges, and forests at frequencies ranging from 110 to 170 GHz.
Proceedings ArticleDOI
Towards THz beam steering with integrated phased photomixer arrays
Peter Offermans,Lei Zhang,Sachin Kasture,Roelof Jansen,Peter De Heyn,Jeonghwan Song,Sofie Janssen,S. Balakrishnan,Philippe Soussan,Joris Van Campenhout,Xavier Rottenberg +10 more
TL;DR: In this article, the authors demonstrate continuous wave (CW) THz generation up to 2.2 GHz by photomixing using antenna-coupled silicon-integrated germanium photodiodes, which reach an optical-to-THz conversion efficiency of about 1% at 100 GHz.
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TL;DR: The current progress of terahertz-wave technologies related to communications applications are examined and some issues that need to be considered for the future of THz communications are discussed.
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Journal ArticleDOI
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TL;DR: It is demonstrated that a directed NLOS path scheme will make a terahertz communication system robust to shadowing, and it is shown that dielectric mirrors covering only parts of the walls will significantly enhance the signal coverage in a typical indoor scenario.