Results 61 to 70 of about 735,881 (338)

MODELING OF MULTIBEAM ANTENNAS FOR TELECOMMUNICATION SYSTEMS

Наука и техника, 2013
The paper considers possibilities pertaining to application of multibeam antennas for communication systems. Modeling of a pyramidal horn antenna and lattice has been carried out in the paper.
V. V. Muraviov, A. A. Tamelo, V. M. Lebedev, A. A. Stepuk   +3 more
doaj  

Compact 0.5–18 GHz double‐ridged guide horn antenna

IET Microwaves, Antennas & Propagation, 2021
Broadband double‐ridged guide horn (DRGH) antennas are extensively used in antenna measurement and electromagnetic compatibility and interference testing, especially the 1–18 GHz DRGH antenna which is widely accepted as a standard for this band.
Bennie Jacobs, Johann W. Odendaal, Johan Joubert   +2 more
doaj   +1 more source

Near-Field Radio Holography of Large Reflector Antennas

, 2007
We summarise the mathematical foundation of the holographic method of measuring the reflector profile of an antenna or radio telescope. In particular, we treat the case, where the signal source is located at a finite distance from the antenna under test,
Baars, J. W. M., Lopez-Perez, J. A., Lucas, R., Mangum, J. G.   +3 more
core   +1 more source

Varying the Operation Bandwidth of Metamaterial-Inspired Filtering Modules for Horn Antennas

, 2015
Recently, we have presented a novel approach to design metamaterial-inspired notch filters that can be integrated within horn antennas of receiving systems to mitigate the effects of narrowband interfering signals.
M. Barbuto, F. Trotta, F. Bilotti, A. Toscano   +3 more
semanticscholar   +1 more source

Magnetically Responsive Piezoelectric Nanocapacitors Enhance Neural Recovery Following Spinal Cord Injury via Targeted Spinal Magnetic Stimulation

Advanced Science, EarlyView.
This study presents a novel “in vivo–in vitro” therapeutic strategy for spinal cord injury by leveraging magnetically responsive piezoelectric nanomaterials. These nanomaterials enable targeted delivery of localized electrical stimulation at the injury site through noninvasive external magnetic actuation, thereby promoting axonal regeneration and ...
Zhihang Xiao, Tingting Li, Lechi Zhang, Chunya Xia, Zelin Su, Xuyan Ren, Yingjie Fan, Zerui Wu, Yaobo Liu, Min Su   +9 more
wiley   +1 more source

Observation of the Askaryan Effect: Coherent Microwave Cherenkov Emission from Charge Asymmetry in High Energy Particle Cascades [PDF]

, 2000
We present the first direct experimental evidence for the charge excess in high energy particle showers predicted nearly 40 years ago by Askaryan. We directed bremsstrahlung photons from picosecond pulses of 28.5 GeV electrons at the SLAC Final Focus ...
Allen Odian, Clive Field, D. Besson, D. Fegan, David Saltzberg, Dawn Williams, Dieter Walz, E. Zas, F. D. Kahn, G. Askaryan, G. Askaryan, G. M. Frichter, George Resch, H. R. Allan, I. Zheleznykh, J. Alvarez-Muñiz, J. Alvarez-Muñiz, J. Alvarez-Muñiz, J. Alvarez-Muñiz, J. V. Jelley, K. Kamata, M. A. Markov, P. W. Gorham, P. W. Gorham, Paul Schoessow, Peter Gorham, R. Dagkesamanskii, Richard Iverson, T. H. Hankins, T. Takahashi   +29 more
core   +2 more sources

Multifunctional Programmable Transmissive Metasurface with Phase and Amplitude Manipulation Capability

Advanced Science, EarlyView.
This work provides a multifunctional programmable transmissive metasurface with phase and amplitude manipulation capability in the sub‐6G band. By applying different coding strategies, the proposed metasurface can realize vortex beam generation, holographic imaging under phase coding mode, and multi‐beam forming in phase‐amplitude joint coding mode ...
Hao Tian Shi, Rui Yuan Wu, Shi He, Xue Yun Guo, Xiao Qing Chen, Yi Ning Zheng, Bing Bing Zhu, Lei Zhang, Tie Jun Cui   +8 more
wiley   +1 more source

Reducing Interface Energy Loss of Perovskite Solar Cells by Molecular Engineering of Hole‐Transporting Materials

Angewandte Chemie, EarlyView.
This study reports a new hole‐transporting material (WD03) designed via molecular engineering to regulate defect passivation and energy‐level alignment in perovskite solar cells (PSCs). The propeller‐shaped structure ensures balanced charge transport and film quality. Consequently, WD03‐based devices deliver a high open‐circuit voltage of 1.194 V under
Guang Shao, Shang‐Gen Yang, Jian Chen, Dian Wang, Jun‐Jie Zhang, Zu‐Kun Zhou, Jing Xiao, Long Jiang, Zhi‐Zheng Wu, Hiroyuki Kanda, Hua Yang, Zeliang Qiu, Ruiyuan Hu, Xingao Li, Ammar Ahmed Khan, Yi Zhang, Jianxing Xia, Mohammad Khaja Nazeeruddin   +17 more
wiley   +2 more sources

Observations of the Askaryan Effect in Ice [PDF]

, 2006
We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower.
A. Connolly, A. Goodhue, A. Romero-Wolf, B. Mercurio, C. Chen, C. Hast, C. J. Naudet, C. L. Hebert, C. Miki, D. Goldstein, D. Saltzberg, D. Seckel, D. Walz, D. Z. Besson, E. Lusczek, F. Wu, G. S. Varner, G. A. Askaryan, G. A. Askaryan, I. M. Zheleznykh, J. G. Learned, J. J. Beatty, J. Kowalski, J. M. Clem, J. Nam, J. Ng, J. T. Link, K. M. Liewer, K. Palladino, K. Reil, L. Ruckman, M. A. DuVernois, M. H. Israel, M. Rosen, M. A. Markov, P. Chen, P. F. Dowkontt, P. Miočinović, P. W. Gorham, R. C. Field, R. Nichol, R. D. Dagkesamanskii, S. Barwick, S. Hoover, S. Matsuno, S. W. Barwick, W. R. Binns   +46 more
core   +2 more sources

An Optically Transparent Water‐Based Metamaterial Absorber for Ultra‐Broadband EMI Shielding in Coal Mines

Advanced Science, EarlyView.
This study introduces a novel metamaterial absorber integrating water as a lossy medium with patterned indium tin oxide (ITO) films to achieve simultaneous optical transparency and ultra‐wideband electromagnetic absorption over 0.52‐40 GHz. It effectively overcomes the limitations of conventional opaque and bulky shielding materials, offering a ...
Xiaojun Huang, Lina Gao, Yidan Xu, Yifei Wang, Wei Hou, Yu Luo   +5 more
wiley   +1 more source