Results 41 to 50 of about 743,686 (282)
IET Microwaves, Antennas & PropagationAn elliptical polarisation conversion metasurface (PCM) is proposed for Ka‐band applications, integrated with a high‐gain substrate‐integrated waveguide (SIW) antenna to achieve significant radar cross section (RCS) reduction.
Cuiqin Zhao, Dongya Shen
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Miniaturisation of high-frequency SURFACE wave radar transmitting antenna
The Journal of Engineering, 2019 Antennas operating in the high-frequency (HF) bands are generally relatively large in size, which severely limits the application of the antennas. Therefore, miniaturisation of the antenna is necessary.
Hong-Bo Li, Yang Song, Chang-Jun Yu
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Advanced Materials, EarlyView.A sulfur‐doped lignin‐derived carbon‐coated Ni‐NiO‐MoO2 nanorod array was synthesized, exhibiting enhanced UOR performance ‐ due to lattice‐strain and built‐in electric field effects by multiphase heterogeneous interface in Ni‐NiO‐MoO2@SC, excellent corrosion resistance, mass‐transport ability, and long‐term stability (500 mA cm−2 at 1.53 V for 500 h ...
Jiawei Li +9 more
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IEEE AccessThis paper presents a novel multiple input multiple output (MIMO) plastic metallized waveguide slot antenna array for 4-D millimeter-wave (MMW) automotive radar.
Qian Chen +6 more
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Fault Detection with Crosshole and Reflection Geo-Radar for Underground Mine Safety
Geosciences, 2020 Ground-penetrating radar and crosshole radar are applied in an underground marble mine for fault detection and to test if different geological bodies can be distinguished.
Jakob Kulich, Florian Bleibinhaus
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Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization
Advanced Materials Interfaces, EarlyView.Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan +6 more
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Advanced Materials Interfaces, EarlyView.Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood +7 more
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Advanced Materials Technologies, EarlyView.Multilayer aerosol jet printed components with a low‐loss, thermally stable dielectric are demonstrated using benzocyclobutene. Ink formulation and in‐line droplet evaporation control support high‐quality, versatile, and stable printing performance. A specialized measurement for low‐loss materials reveals promising microwave properties, which, combined
Md Ramjan Ali +3 more
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Material Selection and Fabrication Processes for Flexible Conformal Antennas
International Journal of Antennas and Propagation, 2018 Flexible antennas offer many advantages for communication, radar, RF identification, and energy harvesting applications. A review on the material selection and fabrication process of flexible antennas is presented since these aspects are critical to the ...
Mahmuda Akter Monne +2 more
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Two-Stage Fast DOA Estimation Based on Directional Antennas in Conformal Uniform Circular Array
Sensors, 2021 In conformal array radar, due to the directivity of antennas, the responses of the echo signals between different antennas are distinct, and some antennas cannot even receive the target echo signal.
Yao Xie +4 more
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