End-to-end 6G Terahertz Wireless Platform with Adaptive Transmit and Receive Beamforming

Abu‐Surra, Shadi; Choi, Won Suk; Choi, Sungtae; Seok, Eunyoung; Kim, Dongjoo; Sharma, Neeraj; Advani, Siddharth; Loseu, Vitali; Bae, Kwang‐Hak; Na, Ilju; Farid, Ali A.; Rodwell, M.J.W.; Xu, Gary Gang; Zhang, Jianzhong

doi:10.1109/iccworkshops53468.2022.9814579

Cited by 13 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13(a) shows the gain pattern of a single halfwavelength dipole, a supedirective dipole pair, and a rectangular patch antenna with copper and a Polydimethylsiloxane substrate ( r = 2.35, tan δ = 0.03) of thickness h = 0.03λ [55]. The estimated patch antenna directivity at broadside is D(0, 0) = 7.1 dBi with radiation efficiency η rad = 60%, yielding a maxum gain G e (0, 0) = 4.86 dBi in perfect agreement with [55], [56]. On the other hand, the superdirective dipole pair offers a 6.6 dBi gain, and exhibits sufficient directionality at the element level.…”

Section: Comparison With Patch Antennasmentioning

confidence: 83%

Superdirective Antenna Pairs for Energy-Efficient Terahertz Massive MIMO

Dovelos,

Assimonis,

Ngo

et al. 2023

IEEE Trans. Commun.

View full text Add to dashboard Cite

Terahertz (THz) communication is widely deemed the next frontier of wireless networks owing to the abundant spectrum resources in the THz band. Whilst THz signals suffer from severe propagation losses, a massive antenna array can be deployed at the base station (BS) to mitigate those losses through beamforming. Nevertheless, a very large number of antennas increases the BS's hardware complexity and power consumption, and hence it can lead to poor energy efficiency (EE). To surmount this fundamental problem, we propose a novel array design based on superdirectivity and nonuniform inter-element spacing. Specifically, we exploit the mutual coupling between closely spaced elements to form superdirective pairs. A unique property of them is that all require the same excitation amplitude, and thus can be driven by a single radio frequency chain akin to conventional phased arrays. Moreover, they facilitate multi-port impedance matching, which ensures maximum power transfer for any beamforming angle. After addressing the implementation issues of superdirectivity, we show that the number of BS antennas can be effectively reduced without sacrificing the achievable rate. Simulation results demonstrate that our design offers huge EE gains compared to uncoupled arrays with uniform spacing, and hence could be a radical solution for future THz systems.

show abstract

Section: Comparison With Patch Antennasmentioning

confidence: 83%

Superdirective Antenna Pairs for Energy-Efficient Terahertz Massive MIMO

Dovelos,

Assimonis,

Ngo

et al. 2023

IEEE Trans. Commun.

View full text Add to dashboard Cite

show abstract

“…The chip enabled 1-D beam steering with a steering angle of ±30°. In 2022 Samsung reported 22 nm CMOS transmitter (with an InP PA for longer distance) and receiver RFICs at 135 GHz for an end-to-end 6G THz platform [129]. In this work, adaptive beamforming for 6.3 Gbps at 30 meter and 2.3 Gbps at 120 meter wireless distance was successfully demonstrated.…”

Section: Mobile 6g Thz Communicationsmentioning

confidence: 84%

“…This non-exhaustive list includes a world's first demonstrations of a wireless transmission of 100 Gbit/s over 100 m using a hybrid photonic/electronic approach [125], a testbed with an antenna array for electronic beam steering [126] and an outdoor transmission for backhaul applications [127]. Recently, Samsung and University of California have presented an end-to-end 6G THz wireless platform with adaptive transmit and receive beamforming at a carrier frequency of 135 GHz [129]. LG and Fraunhofer HHI have successfully tested wireless transmission and reception at a frequency range of 155 to 175 GHz over a distance of 320 meters outdoors [130].…”

Section: B Fwa Demonstrationsmentioning

confidence: 99%

“…A promising solution in that context which also could provide reasonable signal bandwidths for high data-rate THz communications are optical phase shifter [141]. For chipintegrated electronics, the perhaps most common and reliable approach is using CMOS based beamforming transceivers due to their scalability and cost [129], [142]. To reach longer wireless distances, the use of InP power amplifiers (PA) also may prove beneficial [143].…”

Section: Mobile 6g Thz Communicationsmentioning

confidence: 99%

See 1 more Smart Citation

THz Systems Exploiting Photonics and Communications Technologies

et al. 2023

View full text Add to dashboard Cite

Terahertz (THz) systems open up the possibility of new applications of electromagnetic waves. Enormous bandwidths up to several terahertz enable the development of powerful spectroscopy systems that can provide insights into the structure and material of objects with micrometer resolution. New high power and compact THz time-domain spectroscopy (TDS) systems will be presented. The wide bandwidth also enables high-resolution imaging under far-field conditions to analyze arbitrary objects from a distance. In addition, a near-field system-on-a-chip imaging system is presented that achieves a resolution of 10 μm. Additionally, the application of terahertz waves presents challenges due to the low transmit power of the sources, high attenuation in free space, and the high noise figures of the receivers. These challenges can be overcome by antennas with high gain. Since -depending on the application -spatial scanning or focusing in a time-varying direction is required, beam steering is an essential component of many THz systems. In terms of communications, terahertz carrier frequencies offer wide bandwidths, enabling correspondingly high data rates of 100 Gbit/s and more. As a result, the frequency bands between 250 GHz and 450 GHz have already been identified and/or allocated for communication services and are being discussed as a component of 6G mobile communications. Concepts and demonstrations for 6G terahertz mobile communications will be presented. The high bandwidth of terahertz waves can also be used for high-accuracy indoor localization.INDEX TERMS THz time-domain spectroscopy, high average power THz systems, THz far-field imaging, THz near-field imaging, THz communication, THz localization, MTT 70th Anniversary Special Issue.

show abstract

Wireless communications sensing and security above 100 GHz

2023

View full text Add to dashboard Cite

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.

show abstract

End-to-end 6G Terahertz Wireless Platform with Adaptive Transmit and Receive Beamforming

Cited by 13 publications

References 10 publications

Superdirective Antenna Pairs for Energy-Efficient Terahertz Massive MIMO

Superdirective Antenna Pairs for Energy-Efficient Terahertz Massive MIMO

THz Systems Exploiting Photonics and Communications Technologies

Wireless communications sensing and security above 100 GHz

Contact Info

Product

Resources

About