Results 71 to 80 of about 545,717 (377)

Simplified radar architecture based on information metasurface

Nature Communications
Modern radar typically employs a chain radio-frequency (RF)-digital architecture, imposing high costs, substantial hardware burdens, and integration challenges. Here, we propose a simplified radar architecture based on space-time-coding (STC) information
Si Ran Wang, Zhan Ye Chen, Shao Nan Chen, Jun Yan Dai, Jun Wei Zhang, Zhen Jie Qi, Li Jie Wu, Meng Ke Sun, Qun Yan Zhou, Hui Dong Li, Zhang Jie Luo, Qiang Cheng, Tie Jun Cui   +12 more
doaj   +1 more source

A Terahertz Programmable Digital Metasurface Based on Vanadium Dioxide

Photonics
Metasurfaces can realize the flexible manipulation of electromagnetic waves, which have the advantages of a low profile and low loss. In particular, the coding metasurface can flexibly manipulate electromagnetic waves through controllable sequence ...
Tianrui Pan, Chenxi Liu, Shuang Peng, Haiying Lu, Han Zhang, Xiaoming Xu, Fei Yang   +6 more
doaj   +1 more source

Millimeter dust continuum emission unveiling the true mass of giant molecular clouds in the Small Magellanic Cloud

, 2007
CO observations have been so far the best way to trace molecular gas in external galaxies, but at low metallicity the gas mass deduced could be largely underestimated.
Alton, André, Bertoldi, Bolatto, Bot, Bouchet, Boulanger, Boulanger, C. Bot, Cambrésy, Cambrésy, Chin, Dame, Dame, de Geus, de Vries, Dickinson, Draine, Dufour, F. Boulanger, F. Rantakyro, Fatuzzo, Gordon, Grenier, Grenier, Guelin, Heikkila, Henize, Heyer, Hodge, Hunter, Israel, Israel, Israel, Kalberla, Laney, Lequeux, Lequeux, Leroy, Lisenfeld, M. Rubio, MacLaren, Mallouris, McKee, Meijerink, Meyssonnier, Mizuno, Myers, Pohl, Reynolds, Rolleston, Rosado, Rosolowsky, Rosolowsky, Rubio, Rubio, Rubio, Rubio, Schwering, Simon, Sofia, Sofia, Solomon, Stepnik, Strong, Strong, Thomas, Trundle, Tumlinson, Ungerechts, Welty, Williams, Wolleben   +72 more
core   +1 more source

Hybrid Beamforming for Millimeter Wave Systems Using the MMSE Criterion [PDF]

IEEE Transactions on Communications, 2019
Hybrid analog and digital beamforming (HBF) has recently emerged as an attractive technique for millimeter-wave (mmWave) communication systems. It well balances the demand for sufficient beamforming gains to overcome the propagation loss and the desire ...
Tian Lin, Jiaqi Cong, Y. Zhu, Jun Zhang, K. Ben Letaief   +4 more
semanticscholar   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

A plasmonic meta-rotary travelling-wave oscillator with ultrahigh phase accuracy and figure of merit

Light: Science & Applications
High phase accuracy and figure of merit (FOM) of quadrature signals are essential for integrated systems, including quadrature amplitude modulation (QAM) communications and multi-input multi-output (MIMO) radar.
Da Yue Yao, Hao Chi Zhang, Pei Hang He, Jia Jie Shen, Jia Wen Zhu, Peigen Zhou, Xin Yu Zhang, Le Peng Zhang, Li Jie Wu, Cun Yue Wei, Rui Wen Shao, Yi Fan, Yang Zhao, Jixin Chen, Wei Hong, Tie Jun Cui   +15 more
doaj   +1 more source

A Multi-Layer Spoof Surface Plasmon Polariton Waveguide With Corrugated Ground

IEEE Access, 2017
Due to the unique properties of field confinement and enhancement, spoof surface plasmon polaritons (SPPs) are considered as special modes to break many challenges in traditional electronic and microwave engineering.
Pei Hang He, Hao Chi Zhang, Wen Xuan Tang, Zheng Xing Wang, Rui Ting Yan, Tie Jun Cui   +5 more
doaj   +1 more source

Multi-layer transmission line of spoof surface plasmon polaritons

EPJ Applied Metamaterials, 2022
In modern microwave technology, multi-layer structure is widely adopted in compact circuit design. In a multi-layer microwave system, the transmission line (TL) plays an important role.
Lu Yuxi, Tang Wenxuan, Cui Tie Jun
doaj   +1 more source

Millimeter Light Curve with Abrupt Jump in Cyg X-3 2008 April-May Outburst

, 2010
Cyg X-3 is a well-known microquasar with a bipolar relativistic jet. Its famous giant radio outbursts have been repeated once every several years. However, the behavior of the millimeter wave emission has remained unclear because of limitations of time ...
Kotani, Taro, Miyazaki, Atsushi, Nakanishi, Kouichiro, Tsuboi, Masato   +3 more
core   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source