Results 61 to 70 of about 241,717 (322)

A Dual-Port Dual-Wideband Dual-Sense Circularly Polarized DRA With a Novel Feeding Mechanism

IEEE Open Journal of Antennas and Propagation
A dual-wideband dual-sense circularly polarized (CP) dielectric resonator antenna (DRA) based on a novel feeding technique is investigated and demonstrated.
Li Zhang, Jian-Wei Liu, Bo Chen, Liang-Yong Yi, Dian Liu, Zi-Bin Weng, Yong-Chang Jiao   +6 more
doaj   +1 more source

Servomechanism for Doppler shift compensation in optical correlator for synthetic aperture radar [PDF]

, 1980
A method and apparatus for correcting Doppler shifts in synthetic aperture radar data is described. An optical correlator for synthetic aperture radar data has a means for directing a laser beam at a signal film having radar return pulse intensity ...
Bicknell, T. J., Constaninides, N. J.
core   +1 more source

Enhanced Nitric Oxide Electroreduction to Ammonia via Modulating Spin‐Polarization of Fe Single‐Atom Catalysts

Advanced Functional Materials, EarlyView.
A strategic spin‐polarization suppression in Fe single‐atom catalysts is proposed to enhance electrocatalytic reduction of NO to NH3. Employing a top‐down electrospinning strategy, self‐supported FeSAC with Fe‐N3S1 coordination structure and spin‐state transition is engineered from high‐spin to low‐spin.
Jialing Song, Ziqi Wei, Lupeng Han, Zhenlin Wang, Chenghao Fan, Donglin Han, Chunwei Dong, Haiyan Duan, Xiyang Wang, Sam Fong Yau Li, Eslam Hamed, Ming Xie, Emiliano Cortés, Dengsong Zhang   +13 more
wiley   +1 more source

A Miniaturized High-Gain Multi-Beam Lens Antenna Based on Quasi-Conformal Transformation Optics

IEEE Access
This paper presents the design of a novel multi-beam Luneburg lens antenna with specific dielectric structure and proposes a new solution for downsizing planar lens antennas.
Miao Lv, Li Zhang, Mengyi Li, Fanchao Zeng, Shaoli Zuo, Zhi-Ya Zhang, Yu Wang, Tong Wu   +7 more
doaj   +1 more source

Vladimir Aleksandrovich Kotelnikov: Pioneer of the sampling theorem, cryptography, optimal detection, planetary mapping [PDF]

, 2009
In 1933 the young Russian communications engineer Vladimir Aleksandrovich Kotelnikov published a paper in which he formulated for the first time in an engineering context the sampling theorem for lowpass and bandpass signals.
Bissell, Christopher
core   +1 more source

Rational Design of Printable Carbon Nanotube Transparent Conductive Films via Data‐Driven and Mechanistic Insights

Advanced Functional Materials, EarlyView.
A machine learning and simulation‐guided strategy is demonstrated for gentle, non‐sonication dispersion of carbon nanotubes, preserving structural integrity and performance. This approach enables transparent conductive films with low sheet resistance, high transmittance, and sub‐20 µm printability.
Ying Zhou, Ken‐ichi Nomura, Shun Muroga, Makoto Yoneya, Don N. Futaba, Takeo Yamada, Reiko Azumi, Kenji Hata   +7 more
wiley   +1 more source

A dual-band wide angle coverage cavity-backed slot antenna

Journal of Information and Intelligence
A dual-band wide angle coverage cavity-backed slot antenna (WACCBSA) for Wi-Fi applications is proposed in this paper. The antenna's main structure consists of a metal cylindrical body featuring a horizontally oriented long slot on its side and an ...
Jingli Guo, Wenhao Liao, Dingzhang Guo, Ying Liu, Qiao Sun   +4 more
doaj   +1 more source

Radar/ESM anti-bias track association algorithm based on track distance vector detection

The Journal of Engineering, 2019
To address radar/ESM track association problem in the presence of sensor biases and different targets reported by different sensors, an anti-bias track association algorithm based on track distance vectors detection is proposed according to the ...
Baozhu Li, Yunlong Dong, Gaodong Huang, Xiaolong Chen, Jian Guan   +4 more
doaj   +1 more source

A near real-time algorithm for flood detection in urban and rural areas using high resolution Synthetic Aperture Radar images [PDF]

, 2011
A near real-time flood detection algorithm giving a synoptic overview of the extent of flooding in both urban and rural areas, and capable of working during night-time and day-time even if cloud was present, could be a useful tool for operational flood ...
Bates, Paul, Davenport, Ian, Mason, David, Neal, Jeffrey, Schumann, Guy   +4 more
core   +1 more source

Localized High‐Concentration Electrolyte with Water‐Miscible Diluent Enables Stable Zinc Deposition and Long‐Life Aqueous Zinc Metal Batteries

Advanced Functional Materials, EarlyView.
A diisopropyl ether (DIPE)‐based, localized, high‐concentration electrolyte is developed to stabilize both electrodes in aqueous zinc batteries. By reducing water activity and promoting anion‐rich zinc‐ion solvation, it builds robust interphases at both the cathode and anode, ensuring uniform deposition, suppressed corrosion, and highly reversible ...
Yuxuan Wu, Ziwei Zhao, Yue Fei, Hao Zhang, Ge Li   +4 more
wiley   +1 more source