Final published version
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review
}
TY - CHAP
T1 - Vacuum Electronic Devices
AU - Paoloni, Claudio
PY - 2021/12/8
Y1 - 2021/12/8
N2 - The exploitation of the spectrum beyond 100 GHz is the solution for the full implementation of 5G and the development of 6G concepts. Low-power electronics is already available, but technology advancements are needed to overcome the increasing atmosphere and rain attenuation above 100 GHz, which presently limit the transmission distance.New solid-state power amplifiers (SSPA) based on GaN or InP processes have been produced in the recent years, but the best output power achieved is far below the watt level needed for transmission by high modulation schemes over long range.Vacuum electronic devices, namely, traveling-wave tubes (TWTs), offer more than one order of magnitude and more power than SSPA, over wide bandwidth, representing a promising solution for ultrahigh-capacity long links.However, the short wavelength above 100 GHz poses substantial fabrication challenges, which require new technology approaches for high-volume production to bring TWTs into the wireless communication market. This chapter will explore the working mechanism, the potentiality, the features, the state of the art, and the possible deployment scenarios for millimeter-wave and sub-THz TWTs.
AB - The exploitation of the spectrum beyond 100 GHz is the solution for the full implementation of 5G and the development of 6G concepts. Low-power electronics is already available, but technology advancements are needed to overcome the increasing atmosphere and rain attenuation above 100 GHz, which presently limit the transmission distance.New solid-state power amplifiers (SSPA) based on GaN or InP processes have been produced in the recent years, but the best output power achieved is far below the watt level needed for transmission by high modulation schemes over long range.Vacuum electronic devices, namely, traveling-wave tubes (TWTs), offer more than one order of magnitude and more power than SSPA, over wide bandwidth, representing a promising solution for ultrahigh-capacity long links.However, the short wavelength above 100 GHz poses substantial fabrication challenges, which require new technology approaches for high-volume production to bring TWTs into the wireless communication market. This chapter will explore the working mechanism, the potentiality, the features, the state of the art, and the possible deployment scenarios for millimeter-wave and sub-THz TWTs.
U2 - 10.1007/978-3-030-73738-2_27
DO - 10.1007/978-3-030-73738-2_27
M3 - Chapter (peer-reviewed)
SN - 9783030737375
T3 - Springer Series in Optical Sciences
SP - 317
EP - 327
BT - THz Communications
A2 - Kürner, Thomas
A2 - Mittleman, Daniel M.
A2 - Nagatsuma, Tadao
PB - Springer
CY - Cham
ER -