Results 21 to 30 of about 179 (156)

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

IEEE Access, 2021
Accurate propagation characteristics are essential for future indoor millimeter-wave (mmWave) small cell network planning. This paper presents propagation measurements at 26 GHz and 38 GHz which are important candidate bands for fifth generation mmWave ...
Yuyan Shen, Yu Shao, Liao Xi, Heng Zhang, Jie Zhang   +4 more
doaj   +1 more source

On the Design of Conical Antennas for Broadband Impedance Matching Performance

International Journal of Antennas and Propagation, 2017
In the scope of broadband radiators, the biconical antenna, or its monopole conical counterpart, is long known to be a proper choice. One common form of such radiator, the spherically capped conical antenna (SCCA), has closed-form solution to its input ...
Francisco Estêvão Simão Pereira, Maurício Henrique Costa Dias   +1 more
doaj   +1 more source

Theoretical Investigations on CPW-Fed Single and Dual-Polarized Slot Radiators Using Schelkunoff’s Biconical Antenna Analysis [PDF]

Radioengineering, 2020
This article presents a closed-form analysis of CPW-fed slot dipole structures with the help of Schelkunoff’s biconical antenna analysis technique and Babinet’s principle. Input characteristics of CPW-fed slot dipole antennas are investigated, and closed-
A. Banerjee, K. Patra, S. Chatterjee, B. Gupta, A. K. Bandyopadhyay   +4 more
doaj  

3D-Printed UHF-RFID Tag for Embedded Applications

IEEE Access, 2020
This paper presents the design, manufacture and characterization of a novel 3D passive UHF-RFID tag for embedded applications. The prototype is fabricated using additive manufacturing techniques: 3D printing and copper electroplating.
Neus Vidal, Josep Maria Lopez-Villegas, Jordi Romeu, Arnau Salas Barenys, Aleix Garcia-Miquel, Giselle Gonzalez-Lopez, Luis Jofre   +6 more
doaj   +1 more source

Design of Compact Broadband Omni directional Canonical Sleeve Antenna covering 500-3600 MHz

Advanced Electromagnetics, 2018
A novel compact broadband Canonical Sleeve Antenna (CSA) covering 500-3600 MHz with omni directional characteristics is presented in this paper. A new method is employed in which the radiating antenna structure is designed as combination of three ...
C. S. Ram, D. Vakula, M. Chakravarthy
doaj   +1 more source

Test protocol for radiated emissions in medical electrical equipment: case study of telemedicine equipment

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
This protocol was carried out with the purpose of having a methodology for the certification of electromagnetic compatibility of medical electrical equipment, in relation to radiated emissions, in accordance with the provisions of the IEC 60601-1-2 and ...
Antonio José Salazar Gómez, Diana Katherine Cuervo Ramírez   +1 more
doaj   +1 more source

Microwave Compact Biconical Antenna with Low Diffraction Lobes for UAV Control Systems with Protection from Jamming

Advanced Electromagnetics
Results of theoretical investigation, numerical simulation, constructive development and experimental measurements of new compact biconical antenna for UAVs are presented in this article. Peculiarity of designed antenna consists in low diffraction lobes
Stepan Piltyay, Mykhailo Omelianenko
doaj   +1 more source

Visible, near‐, and thermal infrared spectra of asteroid Bennu samples: Relationship to and implications for remote sensing of carbonaceous asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract Remote spectroscopy is used to characterize the mineralogy and infer the history of planetary bodies. Carbonaceous asteroids, such as B‐type (101955) Bennu, represent the earliest stages of planet formation. B types have a blue (negative) spectral slope and comprise <5% of asteroids.
V. E. Hamilton, E. A. Cloutis, R. E. Milliken, P. Haenecour, D. R. Golish, K. J. Domanik, T. J. McCoy, L. P. Keller, A. A. Simon, H. H. Kaplan, C. A. Goodrich, S. A. Sandford, D. Applin, T. Hiroi, D. H. Hill, N. G. Lunning, F. M. McCubbin, S. A. Eckley, C. J. Snead, E. H. Blumenfeld, J. E. Aebersold, C. Schultz, N. Bowles, K. A. Shirley, S. S. Russell, J. J. Barnes, T. J. Zega, D. N. DellaGiustina, A. J. Ryan, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr., D. S. Lauretta   +32 more
wiley   +1 more source

Analysis of Simulated and Measured Indoor Channels for mm-Wave Beamforming Applications

International Journal of Antennas and Propagation, 2018
Ray tracing- (RT-) assisted beamforming, where beams are directly steered to dominant paths tracked by ray tracing simulations, is a promising beamforming strategy, since it avoids the time-consuming exhaustive beam searching adopted in conventional beam
Anders Karstensen, Wei Fan, Fengchun Zhang, Jesper Ø. Nielsen, Gert F. Pedersen   +4 more
doaj   +1 more source

Low‐Temperature Hydrothermal Synthesis of PbUO4

Journal of the American Ceramic Society, Volume 109, Issue 7, July 2026.
A low‐temperature hydrothermal route for synthesizing phase‑pure orthorhombic PbUO4 is demonstrated using metaschoepite and lead nitrate at 150°C–240°C. Systematic variation of pH, temperature, and reaction duration reveals that PbUO4 formation is strongly controlled by solution chemistry, with hydrated Pb‐U phases forming at lower pH and direct ...
Timothy A. Ablott, Maria K. Nicholas, Yingjie Zhang   +2 more
wiley   +1 more source