Channel and Propagation Measurements at 300 GHz

Priebe, Sebastian; Jastrow, C.; Jacob, Mohan V.; Kleine‐Ostmann, Thomas; Schräder, Thorsten; Kürner, Thomas

doi:10.1109/tap.2011.2122294

Cited by 198 publications

(121 citation statements)

References 18 publications

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“…Each and every measurement set concentrates on a specific scenario with some parameter changes. For instance, channel measurement results at 300GHz are described in [7] for different scenarios focusing on path loss measurements under line-of-sight (LOS).…”

Section: A Related Workmentioning

confidence: 99%

Statistical modeling of propagation channels for Terahertz band

Ekti

Boyacı

Alparslan

et al. 2017

2017 IEEE Conference on Standards for Communications and Networking (CSCN)

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Abstract-Digital revolution and recent advances in telecommunications technology enable to design communication systems which operate within the regions close to the theoretical capacity limits. Ever-increasing demand for wireless communications and emerging numerous high-capacity services and applications mandate providers to employ more bandwidth-oriented solutions to meet the requirements. Trend and predictions point out that marketplace targets data rates around 10Gbps or even more within the upcoming decade. It is clear that such rates could only be achieved by employing more bandwidth with the state-of-theart technology. Considering the fact that bands in the range of 275GHz-3000GHz, which are known as Terahertz (THz) bands, are not allocated yet for specific active services around the globe, there is an enormous potential to achieve the desired data rates. Although THz bands look promising to achieve data rates on the order of several tens of Gbps, realization of fully operational THz communications systems obliges to carry out a multidisciplinary effort including statistical propagation and channel characterizations, adaptive transceiver designs, reconfigurable platforms, advanced signal processing algorithms and techniques along with upper layer protocols equipped with various security and privacy levels. Therefore, in this study, several important statistical parameters for line-of-sight (LOS) channels are measured. High resolution frequency domain measurements are carried out at single-sweep within a span of 60GHz. Impact of antenna misalignment under LOS conditions is also investigated. By validating exponential decay of the received power in both time and frequency domain, path loss exponent is examined for different frequencies along with the frequency-dependent path loss phenomenon. Furthermore, impact of humidity is also tested under LOS scenario. Measurement results are presented along with relevant discussions and future directions are provided as well.

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Section: A Related Workmentioning

confidence: 99%

Statistical modeling of propagation channels for Terahertz band

Ekti

Boyacı

Alparslan

et al. 2017

2017 IEEE Conference on Standards for Communications and Networking (CSCN)

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“…Measurements of transmitter and receiver patterns have long been employed for RF antennas [24] but have never been implemented for THz devices. THz beam propagation has been measured in outdoor and indoor environments [25]; these, however, were generic environments.…”

Section: Demonstration Of Novel Measurement and Characterisation Tmentioning

confidence: 99%

Building an end user focused THz based ultra high bandwidth wireless access network: The TERAPOD approach

Davy

Pessoa²,

Renaud

et al. 2017

2017 9th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)

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Abstract-The TERAPOD project aims to investigate and demonstrate the feasibility of ultra high bandwidth wireless access networks operating in the Terahertz (THz) band. The proposed TERAPOD THz communication system will be developed, driven by end user usage scenario requirements and will be demonstrated within a first adopter operational setting of a Data Centre. In this article, we define the full communications stack approach that will be taken in TERAPOD, highlighting the specific challenges and aimed innovations that are targeted.

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“…Among these drivers, the need for spatial control has become more and more important. For instance, communications at high frequencies requires the realization of different propagation channels 2 . Furthermore, spatially-resolved spectroscopy and imaging applications are based on a relative movement between the THz field and the device under test (DUT) 3 .…”

Section: Physikalisch-technische Bundesanstalt Bundesallee 100 3811mentioning

confidence: 99%

Terahertz beam steering by optical coherent control

Füser

Bieler

2013

Applied Physics Letters

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We demonstrate optical coherent control of the emission direction of THz radiation. Femtosecond laser pulses are used to excite different types of ultrafast photocurrents along different directions in a bulk GaAs sample. The overall emission pattern can be modified by changing the phase of the optical excitation. With this method, THz beam steering of about 8 degrees is realized. A simple dipole-based model allows us to relate the size of the steering effect to the amplitude ratio between the different photocurrent contributions and to diffraction effects resulting from the excitation spot size.Research and development in the THz frequency range has been significantly intensified in many scientific and technical areas during the last decades. The main drivers for this process were existing and envisaged applications in communications, spectroscopy, material science, and security 1 . Among these drivers, the need for spatial control has become more and more important. For instance, communications at high frequencies requires the realization of different propagation channels 2 . Furthermore, spatially-resolved spectroscopy and imaging applications are based on a relative movement between the THz field and the device under test (DUT) 3 . One possible approach to accomplish such demands is given by a steerable THz emitter. Various technical realizations based on changes of laser excitation angles or diffractive gratings have been introduced so far 4-8 . However, mechanical movement of components within a measurement setup limits the speed of the measurement process and diffraction effects usually show strong frequency-dependant steering angles. Thus, the development of techniques that allow for non mechanical and broadband steering of the THz beam is desirable.In this work, we present an alternative approach for fast and reliable control of the emission direction of THz radiation. The beam steering as demonstrated here does not rely on mechanical movements of any parts of the setup or on beam shaping apertures but is realized by optical coherent control, i.e., by modifying the phase of the optical excitation pulse. Beam steering is realized by controlling the interference between different optically-induced currents in a bulk GaAs sample. Due to the nonlinear properties of the GaAs crystal, it is possible to induce shift currents, which result from a spatial shift of the center of the electron charge during excitation 9 . Those currents depend on the phase of the excitation pulse and, along certain crystal axes, the direction can be reversed by changing the phase of the excitation. Additionally,

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Channel and Propagation Measurements at 300 GHz

Cited by 198 publications

References 18 publications

Statistical modeling of propagation channels for Terahertz band

Statistical modeling of propagation channels for Terahertz band

Building an end user focused THz based ultra high bandwidth wireless access network: The TERAPOD approach

Terahertz beam steering by optical coherent control

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