Showing 761 - 780 results of 1,101 for search '"microwave"', query time: 0.05s Refine Results
  1. 761

    High Gain Superstrate Loaded Membrane Antenna Based on Substrate Integrated Waveguide Technology by Hamsakutty Vettikalladi

    Published 2015-01-01
    “…The results are verified using CST Microwave Studio and are found to be in good agreement.…”
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  2. 762

    A New Method for Synthesis of Poly(2,6-dimethyl-1,4-phenylene oxide) and Poly(2,6-diphenyl-1,4-phenyl oxide) by Naser M. Al Andis

    Published 2013-01-01
    “…The polymerization of two monomers 2,6-dimethylphenol and 2,6-diphenylphenol was carried out by an oxidative route in the presence of Cu(I) as a catalyst and amine complex as a solvent assisted by microwave heating. The synthesized polymers were characterized by NMR spectroscopy, differential scanning calorimetry (DSC), and gel permeation chromatography (GPC). …”
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  3. 763

    Solvent-free Synthesis of Nitriles from Aldehydes Catalyzed by KF/Al2O3, Montmorillonite KSF and K10 by Li-Jun Li, Ying-Xia Song, Yan-Su Gao, Yan-Feng Li, Jian-Feng Zhang

    Published 2006-01-01
    “…Multistep and one-pot conversion of aldehydes to nitriles were carried out conveniently with out solvent using KF/Al2O3, montmorillonite KSF and K10 as catalyst, under microwave irradiation. The reactions are completed within 6-8 min to give satisfactory yields. …”
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  4. 764
  5. 765

    UHF Metamaterial Absorber with Small-Size Unit Cell by Combining Fractal and Coupling Lines by Shicheng Fan, Yaoliang Song

    Published 2018-01-01
    “…Due to the small ratio, it can be widely used in radiation suppression for microwave relay communication such as mobile communication and wireless network by changing the parameters of the structure.…”
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  6. 766

    Mechanical Properties of Phenolic Composites Reinforced with Flax-g-copolymers Prepared under Different Reaction Conditions - A Comparative Study by Susheel Kalia, B. S. Kaith

    Published 2008-01-01
    “…Graft copolymers of methyl methacrylate (MMA) and its binary mixtures such as MMA + ethyl acrylate (EA), MMA + acrylonitrile (AN), MMA + acrylic acid (AA), MMA + vinyl acetate (VA), MMA + acrylamide (AAm) and MMA + styrene (Sty) with flax fiber have been prepared in air (IA) and under the influence of microwave radiations (MWR). Synthesized flax-g-copolymers under two different reaction conditions were used as reinforcing material in the preparation of phenol-formaldehyde composites. …”
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  7. 767

    Survey of the research and development on the maritime communication technology by Hao DONG, Liang SONG, Cunqing HUA, Lingya LIU, Junhua TANG

    Published 2022-05-01
    “…With the increasing frequency of maritime activities, the development of the maritime communication technology plays an important role.However, due to the complex and changeable maritime environment and the inconsistent communication system standards, the development of maritime communications has significantly lagged.Firstly, maritime communications were divided into four main components, including airspace, land, sea, and crossdomain coordination, according to the difference in communication methods.Then, the development process and research status on a global scale were summarized from the industrial and academic perspectives.Moreover, the main problems existing in the maritime communication were analyzed based on the connections and differences between the different systems.Finally, the technical challenges in the new generation of maritime communication systems were specifically elaborated, including the study of wave motion models learning, maritime channel modeling, atmospheric duct effects, and microwave scattering effects.…”
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  8. 768

    Novel Directional Nanoantennas for Single-Emitter Sources and Wireless Nano-Links by Maciej Klemm

    Published 2012-01-01
    “…The nanoantenna design is based on the travelling wave principle, well known at RF/microwave frequencies. By properly designing the propagating parts of the nanoantenna, a very efficient coupling to free space wave impedance can be achieved. …”
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  9. 769

    A Revised Protecting Group Strategy Enables a Divergent Synthesis of Prenylated Isoflavones from Psoralea corylifolia by Gliszczinskia Sarah von Chamier, Sperlicha Eric, Kellinga Alexandra, Kwesiga George, Schmidt Bernd

    Published 2025
    “…Three bioactive prenylated isoflavone natural products were synthesized for the first time, using a combination of Pd-catalyzed Suzuki–Miyaura coupling for installing the B-ring, microwave-promoted Claisen rearrangement of allyl ethers, and Ru-catalyzed olefin cross me tathesis for obtaining the prenyl substituents. …”
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  10. 770

    Algorithm for Cloud Particle Phase Identification Based on Bayesian Random Forest Method by Fu Tao, Yang Zhipeng, Tao Fa, Hu Shuzhen, Lu Yuxiang, Fu Changqing

    Published 2025-01-01
    “…Results in a high rate of misclassification when employing machine learning techniques for identifying the phase state of cloud particles.To accurately identify phases of cloud particles, a Bayesian Random Forest Method is employed, utilizing co-located millimeter-wave cloud radar and microwave radiometer observations. Models are established separately for rainy and non-rainy weather conditions, utilizing the cloud radar's reflectivity factor, spectral width of velocity, radial velocity, and depolarization ratio, as well as the microwave radiometer's vertical temperature profile and the altitude of each parameter. …”
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  11. 771
  12. 772

    Numerical Analysis of the Fractional-Order Telegraph Equations by Omar Fouad Azhar, Muhammad Naeem, Fatemah Mofarreh, Jeevan Kafle

    Published 2021-01-01
    “…High-frequency telecommunications continuously receive significant attention in the industry due to a slew of radiofrequency and microwave communication networks. These technologies use transmission media to move information-carrying signals from one location to another. …”
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  13. 773

    Broadband absorber with dispersive metamaterials by Han WonHeum, Park Q-Han

    Published 2023-03-01
    “…A broadband absorber that utilizes a dispersive metamaterial and covers the entire microwave X-band (8–12 GHz) is proposed in the present study. …”
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  14. 774
  15. 775

    Catalytic Chemical Recycling of Post-Consumer Plastics: A Review by L. M. Affiku, S. O. Okopi, A. S. Akawu, C. N. Abah, K. O. Joseph

    Published 2025-01-01
    “…The study explored various catalytic methods, including microwave-assisted, plasma-assisted, supercritical water, and photocatalytic conversion, which can yield high-value products. …”
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  16. 776

    Improved Vlasov Antenna with Curved Cuts and Optimized Reflector Position and Shape by H. M. El Misilmani, M. Al-Husseini, K. Y. Kabalan

    Published 2015-01-01
    “…This paper presents a Vlasov antenna with curved cut shape and improved reflector position and geometry suitable for high power microwave applications. The curved shape of the proposed cut totally eliminates the sharp edges and angles present in Vlasov antennas with step and bevel cuts. …”
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  17. 777

    Brane-vector dark matter and its connection to inflation and primordial gravitational waves by Cao H. Nam, Tran N. Hung

    Published 2024-12-01
    “…Interestingly, the brane-vector dark matter could leave particular imprints on the cosmic microwave background (CMB) and the primordial gravitational waves. …”
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  18. 778

    RF Tomography in Free Space: Experimental Validation of the Forward Model and an Inversion Algorithm Based on the Algebraic Reconstruction Technique by V. Picco, T. Negishi, S. Nishikata, D. Spitzer, D. Erricolo

    Published 2013-01-01
    “…Its flexible forward model can be used in free-space by choosing an appropriate dyadic Green's function and can be translated in the microwave domain. Experimental data are used to validate a novel inversion scheme, based on the algebraic reconstruction technique. …”
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  19. 779

    Nano-ZnO Catalyzed Multicomponent One-Pot Synthesis of Novel Spiro(indoline-pyranodioxine) Derivatives by Harshita Sachdeva, Rekha Saroj, Diksha Dwivedi

    Published 2014-01-01
    “…The derivatives are obtained in moderate to excellent yield by one-pot three-component reaction of an isatin, malononitrile/ethylcyanoacetate, and 2,2-dimethyl-1,3-dioxane-4,6-dione in absolute ethanol under conventional heating and microwave irradiation. The catalyst was recovered by filtration from the reaction mixture and reused during five consecutive runs without any apparent loss of activity for the same reaction. …”
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  20. 780

    Symmetry Breaking as a Basis for Characterization of Dielectric Materials by Dubravko Tomić, Zvonimir Šipuš

    Published 2025-01-01
    “…This paper introduces a novel method for measuring the dielectric permittivity of materials within the microwave and millimeter wave frequency ranges. The proposed approach, classified as a guided wave transmission system, employs a periodic transmission line structure characterized by mirror/glide symmetry. …”
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