Multi-kilometre and multi-gigabit-per-second sub-terahertz communications for wireless backhaul applications

Sen, Priyangshu; Siles, José V.; Thawdar, Ngwe; Jornet, Josep Miquel

doi:10.1038/s41928-022-00897-6

Cited by 63 publications

(15 citation statements)

References 41 publications

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“…In fact, these absorption resonances need not always be considered a hindrance; with careful frequency tuning, they can be exploited for enhanced wireless security 12 . Despite some older conventional wisdom, the atmosphere is not opaque to radiation in the 100–1000 GHz range; if the H 2 O lines are avoided, point-to-point links in the km range are certainly feasible 4 , 13 – 15 . Inclement weather also contributes additional loss; 16 , 17 however, these may be tolerable under certain conditions, and indeed terahertz beams appear to be more robust against atmospheric scintillation and certain weather conditions (e.g., fog) than, for example, free-space optical signals in the near-infrared 18 .…”

Section: Introductionmentioning

confidence: 99%

Wireless communications sensing and security above 100 GHz

2023

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The field of sub-terahertz wireless communications is advancing rapidly, with major research efforts ramping up around the globe. To address some of the significant hurdles associated with exploiting these high frequencies for broadband and secure networking, systems will require extensive new capabilities for sensing their environment and manipulating their broadcasts. Based on these requirements, a vision for future wireless systems is beginning to emerge. In this Perspective article, we discuss some of the prominent challenges and possible solutions which are at the forefront of current research, and which will contribute to the architecture of wireless platforms beyond 5G.

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Section: Introductionmentioning

confidence: 99%

Wireless communications sensing and security above 100 GHz

2023

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“…THz communication systems themselves have also developed significantly over the last 20 years. Namely, the maximum output power of THz devices has increased substantially to enable experimental demonstrations of long-range point-to-point THz links (Castro et al, 2020;Sen et al, 2022). Such advances make point-to-point wireless links over (sub-) THz bands practical in the foreseeable future.…”

Section: Introductionmentioning

confidence: 99%

“…Large bands available at (sub-)THz frequencies can be utilized to design very high data rate and low latency networks. With the THz technology gap closing, THz radios have been utilized in demonstrating wideband [2], long range [3], and high data rate links [4].…”

Section: Introductionmentioning

confidence: 99%

“…Possibly,(1) is not presented for the first time ever (i.e., similar cases are discussed in[13] and[17]). We just need an accurate equation to proceed and haven't found a reference to cite it in this exact form (for two square arrays) 3. We model a line-of-sight (LoS) channel in the THz transparency window, so the molecular absorption is of secondary importance compared to the spreading loss, transmit power, and antenna gains.…”

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confidence: 99%

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Mobile near-field terahertz communications for 6G and 7G networks: Research challenges

2023

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Following the current development of the wireless technology landscape, and with respect to the constant growth in user demands, it is inevitable that next-generation mobile wireless networks will use new frequency bands located in the sub-terahertz and terahertz (THz) spectrum to complement the existing microwave and millimeter wave (mmWave) channels. The feasibility of point-to-point stationary THz communication links has already been experimentally demonstrated. To build upon this breakthrough, one of the pressing research targets is making THz communication systems truly mobile. Achieving this target is especially complicated because mobile THz wireless systems (including WLANs and even cellular access) will often operate in the near-field due to the very large (even though physically small) electrical size of the high-gain antenna systems required for making high-rate communication links feasible at such frequencies. This perspective article presents several key prospective research challenges envisioned on the way to designing efficient mobile near-field THz wireless access as a part of 6G and 7G wireless landscapes.

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“…In recent years, with the increasing maturity of terahertz technology, terahertz waves have been widely used in many application systems, such as terahertz detection [ 1 , 2 ], sensing [ 3 , 4 ], communication [ 5 , 6 ], and radar [ 7 , 8 ]. Especially in the application of 5G communication [ 9 , 10 ] and the technological development of 6G communication [ 11 , 12 ] in the future, terahertz communication technology has been widely considered by countries all over the world. However, due to the lack of suitable unidirectional transmission devices, the terahertz echoes caused by the reflections and scattering in these systems bring a lot of noise to the system’s operation and even danger to the key components, such as the light sources and detectors, thus severely limiting improvements to the performance of terahertz systems [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Flexible Metamaterial Quarter-Wave Plate and Its Application in Blocking the Backward Reflection of Terahertz Waves

Sun¹,

Liu²,

et al. 2023

Nanomaterials

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A terahertz flexible metamaterial quarter-wave plate (QWP) is designed and fabricated using polyimide as the substrate in this paper, with a 3 dB axial ratio bandwidth of 0.51 THz and high polarization conversion efficiency and transmittance. The effect of the incidence angle on the polarization conversion performance of the QWP is discussed by measuring the transmissions at multiple incidence angles. The blocking effect of this QWP combined with a polarizer on the backward reflection of terahertz waves is investigated by terahertz time-domain spectral transmission experiments. By adjusting the angle of the QWP and polarizer with respect to the incident light in the optical path, a blocking efficiency of 20 dB can be achieved at a 20° incidence angle, with a bandwidth of 0.25 THz, a maximum blocking efficiency of 58 dB at 1.73 THz, and an insertion loss of only 1.4 dB. Flexible terahertz metamaterial QWPs and polarizers can effectively block harmful reflected waves in terahertz communication and other systems. They have the advantages of a simple structure, ultra-thinness and flexibility, easy integration, no external magnetic field, and no low-temperature and other environmental requirements, thus having broad application prospects for terahertz on-chip integrated systems.

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Multi-kilometre and multi-gigabit-per-second sub-terahertz communications for wireless backhaul applications

Cited by 63 publications

References 41 publications

Wireless communications sensing and security above 100 GHz

Wireless communications sensing and security above 100 GHz

Mobile near-field terahertz communications for 6G and 7G networks: Research challenges

Flexible Metamaterial Quarter-Wave Plate and Its Application in Blocking the Backward Reflection of Terahertz Waves

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