Zobrazeno 1 - 10
of 719
pro vyhledávání: '"Sub TeraHertz"'
Autor:
Yusuke Kumazaki, Shiro Ozaki, Naoya Okamoto, Naoki Hara, Yasuhiro Nakasha, Masaru Sato, Toshihiro Ohki
Publikováno v:
IEEE Journal of the Electron Devices Society, Vol 12, Pp 965-973 (2024)
This paper demonstrated high-output-power and high-efficiency power amplifier (PA) monolithic microwave-integrated circuit (MMIC) at 300-GHz band (252–296 GHz) with the use of InPbased metal–oxide–semiconductor high-electron-mobility transistor
Externí odkaz:
https://doaj.org/article/74698a919443403894f8fa8759ab55b2
Autor:
Chihiro Kobayashi, Tomoya Nishiwaki, Tadao Tanabe, Takahiro Oohashi, Hitoshi Hamasaki, Shuya Hikishima, Akio Tanaka, Koji Arita, Sho Fujii, Daisuke Sato, Takeshi Kidokoro
Publikováno v:
Developments in the Built Environment, Vol 18, Iss , Pp 100423- (2024)
Terahertz (THz) and sub-terahertz (sub-THz) waves are unexplored waves between the infrared and microwave ranges. This range features unique characteristics of both light resolution and electromagnetic wave transmission. Sub-THz waves are part of att
Externí odkaz:
https://doaj.org/article/ce291025d90746e3afccdd40f395d09e
Toward Sub‐Terahertz: Space‐Time Coding Metasurface Transmitter for Wideband Wireless Communications
Autor:
Yujie Liu, Yu Wang, Xiaojian Fu, Lei Shi, Fei Yang, Jiang Luo, Qun Yan Zhou, Yuan Fu, Qi Chen, Jun Yan Dai, Lei Zhang, Qiang Cheng, Tie Jun Cui
Publikováno v:
Advanced Science, Vol 10, Iss 29, Pp n/a-n/a (2023)
Abstract A space‐time coding metasurface (STCM) operating in the sub‐terahertz band to construct new‐architecture wireless communication systems is proposed. Specifically, a programmable STCM is designed with varactor‐diode‐tuned metasurfac
Externí odkaz:
https://doaj.org/article/6f32d844721f4602b1f93c3cd1425b44
Autor:
Bazilah Baharom, Yoshiki Sugimoto, Bakar Rohani, Kunio Sakakibara, Nobuyoshi Kikuma, Yoshihide Yamada, Nurul Huda Abd Rahman
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 1074-1086 (2023)
A $2\times2$ lens array provides a half reduction of antenna height compared to the twice-diameter single-feed lens antenna with an almost similar gain performance due to the same aperture size. However, it generally suffers from a non-uniform amplit
Externí odkaz:
https://doaj.org/article/d28bb211a9e74a1f89094428cc52dd8e
Autor:
Alexander Shurakov, Polina Rozhkova, Abdukodir Khakimov, Evgeny Mokrov, Anatoliy Prikhodko, Vyacheslav Begishev, Yevgeni Koucheryavy, Mikhail Komarov, Gregory Gol'tsman
Publikováno v:
IEEE Access, Vol 11, Pp 134677-134689 (2023)
The sixth-generation cellular systems are expected to utilize the text sub-terahertz frequency band covering 100–300-GHz. Due to high path losses, the coverage of such systems will be limited to a few tens of meters making them suitable for indoor
Externí odkaz:
https://doaj.org/article/55a0e2bdf1c64e04ba68673ee6eb0dc2
Autor:
Yusuke Kumazaki, Shiro Ozaki, Yasuhiro Nakasha, Naoya Okamoto, Atsushi Yamada, Toshihiro Ohki
Publikováno v:
Applied Physics Express, Vol 17, Iss 8, p 086504 (2024)
This study describes high-power and high-efficiency W-band InAlGaN/AlN/GaN high-electron-mobility transistors (HEMTs) for future sub-terahertz wireless communications. A low-thermal-budget selective-area growth (SAG) process was developed to obtain l
Externí odkaz:
https://doaj.org/article/f48ba22100a04f2aad0f2c84cc53a687
Publikováno v:
Journal of the European Optical Society-Rapid Publications, Vol 20, Iss 1, p 22 (2024)
Terahertz radiation has emerged as a prominent solution for imaging and detection beyond visible and infrared. Active terahertz imaging is a widely used technology in this context especially for security applications and screening. Such systems are b
Externí odkaz:
https://doaj.org/article/3adbcd9b5347435ea384d719ed37d2f3
Autor:
Nikita A. Bylinskiy, Yuriy K. Kalynov, Valentina E. Kotomina, Nikolay Yu. Peskov, Mikhail D. Proyavin, Andrei V. Savilov, Dmitry D. Sobolev, Alexander A. Vikharev, Vladislav Yu. Zaslavsky
Publikováno v:
Instruments, Vol 7, Iss 3, p 27 (2023)
A novel concept of a frequency-tuned sub-terahertz gyrotron based on a combination of an irregular low-frequency resonator and an external reflector has been proposed recently. A simulation was carried out for a fundamental-cyclotron-harmonic gyrotro
Externí odkaz:
https://doaj.org/article/b04684e8162d4f6494802ff5796c0907
Akademický článek
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Autor:
Ahmad Alammouri, Jianhua Mo, Vishnu V. Ratnam, Boon Loong Ng, Robert W. Heath, Juho Lee, Jianzhong Zhang
Publikováno v:
IEEE Access, Vol 10, Pp 88872-88884 (2022)
In this paper, we establish the potential of joint phase-time arrays (JPTAs) for uplink coverage extension in cellular systems. JPTA allows the base station (BS) to create frequency-dependent wide-beams without sacrificing the array gain. In this wor
Externí odkaz:
https://doaj.org/article/6041e9d6d7d141da916cdb7d3b6c7ce6