100-340GHz Systems: Transistors and Applications

Rodwell, M.J.W.; Fang, Yihao; Rode, Johann C.; Wu, Jun; Markman, Brian; Brunelli, Simone Tommaso Šuran; Klamkin, Jonathan; Urteaga, M.

doi:10.1109/iedm.2018.8614537

Cited by 17 publications

(12 citation statements)

References 10 publications

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“…While 5G, IEEE 802.11ay, and 802.15.3d [19], [20] are being built out for the mmWave spectrum and promise data rates up to 100 Gbps, future 6G networks and wireless appli-cations are probably a decade away from implementation, and are sure to benefit from operation in the 100 GHz to 1 THz frequency bands where even greater data rates will be possible [3], [7], [10]. The short wavelengths at mmWave and THz will allow massive spatial multiplexing in hub and backhaul communications, as well as incredibly accurate sensing, imaging, spectroscopy, and other applications described subsequently in this paper [21]- [24]. The THz band, which we shall describe as being from 100 GHz through 3 THz, can also enable secure communications over highly sensitive links, such as in the military due to the fact that extremely small wavelengths (orders of microns) enable extremely high gain antennas to be made in extremely small physical dimensions [25].…”

mentioning

confidence: 88%

“…However, mmWave and THz radar can be used for assisting driving or flying in foul weather, as well as in military and national security [10], [21], [25]. High-definition video resolution radars that operate at several hundred gigahertz will be sufficient to provide a TV-like picture quality and will complement radars at lower frequencies (below 12.5 GHz) that provide longer range detection but with poor resolution [21], [23]. Dual-frequency radar systems will enable driving or flying in very heavy fog or rain [21].…”

Section: Imagingmentioning

confidence: 99%

“…The array angular resolution approximates λ/L, where λ is the wavelength at the carrier frequency and L is the aperture of the array. For example, consider a fixed wireless system or mobile base station using a 340 GHz carrier with a 35 cm (14 inch) aperture -this permits a sharp 0.14 • beam resolution [21]. Three system examples -a 140 GHz, 10 Gbps picocell backhaul unit using 64-element arrays; a 340 GHz, 8-channel 160 Gbps MIMO backhaul link with each channel comprised of a 64-element subarray module; and a headsup-display 400 GHz automotive imaging radar using a linear 64 × 512 array and frequency scanned beam steering were presented in [60], thus proving the capability of building THz systems.…”

Section: Moving To Beyond 5g and Above 100 Ghz-a New Type Of Channelmentioning

confidence: 99%

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Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

et al. 2019

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Frequencies from 100 GHz to 3 THz are promising bands for the next generation of wireless communication systems because of the wide swaths of unused and unexplored spectrum. These frequencies also offer the potential for revolutionary applications that will be made possible by new thinking, and advances in devices, circuits, software, signal processing, and systems. This paper describes many of the technical challenges and opportunities for wireless communication and sensing applications above 100 GHz, and presents a number of promising discoveries, novel approaches, and recent results that will aid in the development and implementation of the sixth generation (6G) of wireless networks, and beyond. This paper shows recent regulatory and standard body rulings that are anticipating wireless products and services above 100 GHz and illustrates the viability of wireless cognition, hyper-accurate position location, sensing, and imaging. This paper also presents approaches and results that show how long distance mobile communications will be supported to above 800 GHz since the antenna gains are able to overcome airinduced attenuation, and present methods that reduce the computational complexity and simplify the signal processing used in adaptive antenna arrays, by exploiting the Special Theory of Relativity to create a cone of silence in over-sampled antenna arrays that improve performance for digital phased array antennas. Also, new results that give insights into power efficient beam steering algorithms, and new propagation and partition loss models above 100 GHz are given, and promising imaging, array processing, and position location results are presented. The implementation of spatial consistency at THz frequencies, an important component of channel modeling that considers minute changes and correlations over space, is also discussed. This paper offers the first in-depth look at the vast applications of THz wireless products and applications and provides approaches for how to reduce power and increase performance across several problem domains, giving early evidence that THz techniques are compelling and available for future wireless communications. INDEX TERMS mmWave, millimeter wave, 5G, D-band, 6G, channel sounder, propagation measurements, Terahertz (THz), array processing, imaging, scattering theory, cone of silence, digital phased arrays, digital beamformer, signal processing for THz, position location, channel modeling, THz applications, wireless cognition, network offloading. I. INTRODUCTION The tremendous funding and research efforts invested in millimeter wave (mmWave) wireless communications, and The associate editor coordinating the review of this manuscript and approving it for publication was Thomas Kuerner. the early success of 5G trials and testbeds across the world, ensure that commercial widespread 5G wireless networks will be realized by 2020 [1]. The use of mmWave in 5G wireless communication will solve the spectrum shortage in current 4G cellular communication systems that operate

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confidence: 88%

Section: Imagingmentioning

confidence: 99%

Section: Moving To Beyond 5g and Above 100 Ghz-a New Type Of Channelmentioning

confidence: 99%

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Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

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“…Explicitly, this approach serves as a guide to the suitability or otherwise of using any of THz spectrum for communications and other application purposes. Another issue that demands investigation is how to address scenarios supporting multiple applications [17]. In this case the ensuing harmonic overlaps can be mitigated by careful frequency planning.…”

Section: Path Lossesmentioning

confidence: 99%

Potential key challenges for terahertz communication systems

Solyman

Elhaty

2021

IJECE

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The vision of 6G communications is an improved performance of the data rate and latency limitations and permit ubiquitous connectivity. In addition, 6G communications will adopt a novel strategy. Terahertz (THz) waves will characterize 6G networks, due to 6G will integrate terrestrial wireless mobile communication, geostationary and medium and low orbit satellite communication and short distance direct communication technologies, as well as integrate communication, computing, and navigation. This study discusses the key challenges of THz waves, including path losses which is considered the main challenge; transceiver architectures and THz signal generators; environment of THz with network architecture and 3D communications; finally, Safety and health issues.

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“…nP-based transistors are of interest for future high-frequency communication systems [2][3]. High f is important for future low noise, mm-wave communication systems [4]. State-of-theart InP based HEMTs exhibit 610 GHz f [2] and 703 GHz f [5].…”

Section: Introductionmentioning

confidence: 99%

In₀.₅₃Ga₀.₄₇As/InAs Composite Channel MOS-HEMT Exhibiting 511 GHz f_τ and 256 GHz f _max

Markman

Brunelli

Goswami

et al. 2020

IEEE J. Electron Devices Soc.

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An In0.53Ga0.47As/InAs composite channel MOS-HEMT exhibiting peak f = 511 GHz and peak fmax = 285 GHz is demonstrated. Additionally, another device exhibiting peak f = 286 GHz and peak fmax = 460 GHz is reported. The devices have a 1 nm / 3 nm AlxOyNz interfacial layer and ZrO2 gate dielectric on a 2 nm / 4 nm In0.53Ga0.47As / InAs composite channel with a modulation doped In0.52Al0.48As back barrier. To reduce parasitic gate-source and gate-drain capacitances, a modulation doped In0.52Al0.48As / In0.53Ga0.47As / InAs composite quantum well is included between the gate edges and the N+ source and drain. Compared to [1], addition of an In0.52Al0.48As back-barrier, scaling of S/D metal spacing, and scaling of channel thickness has enabled improved transconductance and increased f. Short gate length devices fmax are limit by high RG due to poor metal filling of the T-Gate stem and large CDS due to a conductive etch stop layer. Long gate length devices exhibit better metal filling, reduced RG, and balanced fꚍ, fmax. Devices exhibit 10-15% DC-1 GHz gm,e suggesting that the high-k / semiconductor interface has low Dit.

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100-340GHz Systems: Transistors and Applications

Cited by 17 publications

References 10 publications

Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

Potential key challenges for terahertz communication systems

In₀.₅₃Ga₀.₄₇As/InAs Composite Channel MOS-HEMT Exhibiting 511 GHz f_τ and 256 GHz f _max

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100-340GHz Systems: Transistors and Applications

Cited by 17 publications

References 10 publications

Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

Potential key challenges for terahertz communication systems

In₀.₅₃Ga₀.₄₇As/InAs Composite Channel MOS-HEMT Exhibiting 511 GHz fτ and 256 GHz f max

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Product

Resources

About

In₀.₅₃Ga₀.₄₇As/InAs Composite Channel MOS-HEMT Exhibiting 511 GHz f_τ and 256 GHz f _max