Comparison of Diffuse Roughness Scattering from Material Reflections at 500-750 GHz

Serghiou, Demos; Khalily, Mohsen; Johny, Susan; Stanley, Manoj; Fatadin, Irshaad; Brown, Tim; Ridler, N M; Tafazolli, Rahim

doi:10.23919/eucap51087.2021.9411422

Cited by 6 publications

(6 citation statements)

References 15 publications

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“…Otherwise, for edges greater than 1 mm the surface may be considered as smooth. Additionally, multi-layer reflections within in-homogeneous materials are also another possibility at THz resulting in attenuation dips to the received signal at selective carrier frequencies, and additional diffuse components [126].…”

Section: G Propagation Mechanismsmentioning

confidence: 99%

“…In such complex cases, the applicability of VNAs is no longer viable since they take too long to perform a full frequency sweep surpassing the channel coherence time [136], and therefore not allowing for dynamic channel variations such as Doppler shifts to be captured in order to analyze the effects of link blockage. Nevertheless a VNA can provide an excellent dynamic range (∼ 120 dB) [140] and a very high delay resolution [126], allowing for a very large number of MPCs to be resolved over significantly broad bandwidths; Nonetheless, the bandwidth is directly dependent upon the selected waveguide interface [141] used for Single-Input Single-Output (SISO) measurements. State-of-the-art frequency extender modules commercially available, can operate between 50 GHz to 1.5 THz with varying bandwidths that reach up to 350 GHz in the higher end [142].…”

Section: Vna Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: A Survey, Open Challenges and Future Research Directions

Serghiou

Khalily

Brown

et al. 2022

IEEE Commun. Surv. Tutorials

136

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The Terahertz (THz) band (0.3-3.0 THz), spans a great portion of the Radio Frequency (RF) spectrum that is mostly unoccupied and unregulated. It is a potential candidate for application in Sixth-Generation (6G) wireless networks, as it has the capabilities of satisfying the high data rate and capacity requirements of future wireless communication systems. Profound knowledge of the propagation channel is crucial in communication systems design, which nonetheless is still at its infancy, as channel modeling at THz frequencies has been mostly limited to characterizing fixed Point-to-Point (PtP) scenarios up to 300 GHz. Provided the technology matures enough and models adapt to the distinctive characteristics of the THz wave, future wireless communication systems will enable a plethora of new use cases and applications to be realized, in addition to delivering higher spectral efficiencies that would ultimately enhance the Quality-of-Service (QoS) to the end user. In this paper, we provide an insight into THz channel propagation characteristics, measurement capabilities, and modeling techniques for 6G communication applications, along with guidelines and recommendations that will aid future characterization efforts in the THz band. We survey the most recent and important measurement campaigns and modeling efforts found in literature, based on the use cases and system requirements identified. Finally, we discuss the challenges and limitations of measurement and modeling at such high frequencies and contemplate the future research outlook toward realizing the 6G vision.

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Section: G Propagation Mechanismsmentioning

confidence: 99%

Section: Vna Measurementsmentioning

confidence: 99%

Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: A Survey, Open Challenges and Future Research Directions

Serghiou

Khalily

Brown

et al. 2022

IEEE Commun. Surv. Tutorials

136

View full text Add to dashboard Cite

show abstract

“…Otherwise, for edges greater than 1 mm the surface may be considered as smooth. Additionally, multi-layer reflections and reflections within in-homogeneous materials are also another possibility at THz especially as the permittivity (ϵ r ) of the material gets closer to unity resulting in additional diffuse components [110]. Other factors that influence the amount of scattering besides wavelength include the size, shape and refractive index of the scatterer [111].…”

Section: F Other Propagation Phenomenamentioning

confidence: 99%

“…In such complex cases, the applicability of VNAs is no longer viable since they take too long to perform a full frequency sweep surpassing the channel coherence time [130], and therefore not allowing for dynamic channel variations such as Doppler shifts to be captured in order to analyze the effects of link blockage. Nevertheless a VNA can provide an excellent dynamic range (∼ 120 dB) [134] and a very high delay resolution [110] allowing for a very large number of MPCs to be resolved over significantly broad bandwidths; Nonetheless, the bandwidth is directly dependent upon the selected waveguide interface [135] used for Single-Input Single-Output (SISO) measurements. Frequency extender modules that are commercially available can operate between 50 GHz to 1.1 THz with varying bandwidths that reach up to 350 GHz in the higher end [136].…”

Section: Vna Measurementsmentioning

confidence: 99%

“…Salhi et al [164] investigated broadband angular channel characteristics by conducting measurements for 5 different frequency bands up to 321 GHz for a short range indoor desktop download scenario that can be considered as a very similar use case to the kiosk download scenario. Recently, short range characterization was extended to carrier frequencies of 625 GHz with 250 GHz bandwidth to measure the channel properties in the the ultrawideband [119], [110]. It was found that specular components from nearby scatterers are significant while reflections from various materials can induce diffuse components that form clusters due to the high frequency selectivity at THz, which nonetheless, is extremely unpredictable.…”

Section: Thz Channel Characterization For 6g Applicationsmentioning

confidence: 99%

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Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: a Survey, Open Challenges and Future Research Directions

Serghiou¹,

Khalily²,

Brown³

et al. 2022

Preprint

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The Terahertz (THz) band (0.1-3.0 THz) spans a great portion of the Radio Frequency (RF) spectrum that is mostly unoccupied and unregulated. It is a potential candidate for application in Sixth-Generation (6G) wireless networks as it has the capabilities of satisfying the high data rate and capacity requirements of future wireless communication systems. Profound knowledge of the propagation channel is crucial in communication systems design which nonetheless, is still at its infancy as channel modeling at THz frequencies has been mostly limited to characterizing fixed Point-to-Point (P2P) scenarios up to 300 GHz. Provided the technology matures enough and models adapt to the distinctive characteristics of the THz wave, future wireless communications systems will enable a plethora of new use cases and applications to be realized in addition to delivering higher spectral efficiencies that would ultimately enhance the Quality-of-Service (QoS) to the end user. In this paper, we provide an insight into THz channel propagation characteristics, measurement capabilities and modeling methods along with recommendations that will aid in the development of future models in the THz band. We survey the most recent and important measurement campaigns and modeling efforts found in literature based on the use cases and system requirements identified. Finally, we discuss the challenges and limitations of measurements and modeling at such high frequencies and contemplate the future research outlook toward realizing the 6G vision.

show abstract

Material Reflection Measurements in Centimeter and Millimeter Wave ranges for 6G Wireless Communications

Aliouane

Conrat

Cousin

et al. 2022

2022 Joint European Conference on Networks and Communications &Amp; 6G Summit (EuCNC/6G Summit)

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Research in the field of telecommunication is moving towards 6G. Upper mm Wave frequencies (100-300 GHz) are seen as a promising band for 6G. ITU recommendations on material characteristics are limited to 100 GHz. This study aims to further extend the currently existing knowledge on wavematerial interaction and make the link between below and above 100 GHz frequencies by providing reflection measurements from 2 to 170 GHz. The material reflection coefficients of seventeen different materials e.g. glass, wood, aerated concrete, and polystyrene are continuously reported along the measured band. The measurement setup is based on a vector network analyzer with millimeter wave extension modules connected starting from 50 GHz.

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Comparison of Diffuse Roughness Scattering from Material Reflections at 500-750 GHz

Cited by 6 publications

References 15 publications

Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: A Survey, Open Challenges and Future Research Directions

Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: A Survey, Open Challenges and Future Research Directions

Terahertz Channel Propagation Phenomena, Measurement Techniques and Modeling for 6G Wireless Communication Applications: a Survey, Open Challenges and Future Research Directions

Material Reflection Measurements in Centimeter and Millimeter Wave ranges for 6G Wireless Communications

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