Results 91 to 100 of about 68,631 (303)

A dual-band dipole array antenna with fan-beam radiation for biomedical and telecommunications applications

Results in Engineering
This study introduces a new technique for achieving dual-band functionality in a printed dipole antenna with integrated balun feeding without additional elements.
Rahim Barzegari, Changiz Ghobadi, Javad Nourinia   +2 more
doaj   +1 more source

On the Impact of the Antenna Radiation Patterns in Passive Radio Sensing

IEEE Antennas and Wireless Propagation Letters
Electromagnetic (EM) body models based on the scalar diffraction theory allow to predict the impact of subject motions on the radio propagation channel without requiring a time-consuming full-wave approach. On the other hand, they are less effective in complex environments characterized by significant multipath effects. Recently, emerging radio sensing
Federica Fieramosca, Vittorio Rampa, Stefano Savazzi, Michele D'Amico   +3 more
openaire   +2 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Analysis and design of aircraft antennas [PDF]

Recording systems and other associated electronic equipment were engineered, calibrated, and used to measure antenna radiation patterns of aircraft structures. Antenna design, measured and computed results, and performance are discussed.
Balanis, C. A.
core   +1 more source

Theory of v.o.r. antenna radiation patterns

Electronics Letters, 1971
The radiation field produced by v.o.r. antennas consisting of Alford loops located above a circular conducting ground plane is investigated theoretically and experimentally. Geometrical theory of diffraction is applied to obtain the theoretical expressions for the far field produced by such an antenna.
openaire   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Planar dielectric resonator stabilized HEMT oscillator integrated with CPW/aperture coupled patch antenna [PDF]

A new design of an active antenna with a dielectric resonator stabilized high electron mobility transistor (HEMT) oscillator (DRO) and an aperture-coupled patch antenna is reported.
Lee, Richard Q., Simons, Rainee N.
core   +1 more source

Simple reconfigurable antenna with radiation pattern

Electronics Letters, 2008
A radiation pattern reconfigurable antenna is proposed. By controlling the switch states, the antenna can be worked as a monopole antenna with an omnidirectional radiation pattern or a dipole antenna with reflector, which has directional radiation pattern.
W.S. Kang, J.A. Park, Y.J. Yoon
openaire   +1 more source

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Synthesis of sparse rectangular planar arrays with weight function and improved grey wolf optimization algorithm

IET Microwaves, Antennas & Propagation
The present article proposes a novel hybrid approach for addressing the synthesis problem of rectangular planar arrays under multiple constraints, through joint optimization of the weight function and the improved grey wolf optimization (IGWO) algorithm.
Kui Tao, Bin Wang, Xue Tian, Qi Tang, Guihan Xie   +4 more
doaj   +1 more source