Results 31 to 40 of about 32,533 (358)
IET Microwaves, Antennas & Propagation, 2021 Two metamaterial‐based linear phased array antennas with improved wide‐angle scanning bandwidth are designed in this study. Metamaterial antenna element consists of a metamaterial patch, periodic metal strips, distributed metal strips and slot coupling ...
Qi Zhang +5 more
doaj +1 more source
High efficiency multifrequency feed [PDF]
, 1974 Antenna systems and particularly compact and simple antenna feeds which can transmit and receive simultaneously in at least three frequency bands, each with high efficiency and polarization diversity are described.
Ajioka, J. S. +2 more
core +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
The Journal of EngineeringA printed circularly polarised antenna array is presented that utilizes the inherent good bandwidth and stable gain of magneto‐electric dipoles in combination with the wideband benefits of a sequential rotation feed technique.
Elmien Coetzer +2 more
doaj +1 more source
Three-Dimensional Dual-Band Dielectric Resonator Antenna for Wireless Communication
IEEE Access, 2020 A three-dimensional dual-band dielectric resonator antenna, comprised of five rectangular dielectric resonator (RDR) radiating elements, is proposed for wireless communication applications.
Shailesh Mishra +4 more
doaj +1 more source
Hoop/column antenna deployment mechanism overview [PDF]
, 1985 The hoop/column antenna program is directed toward the development of a cost effective, large area, self deploying reflector antenna system. Large surface area antenna systems are required in future space missions involving improved land communications ...
Allen, B. B., Butler, D. H.
core +1 more source
Flexible dual-diversity wearable wireless node integrated on a dual-polarised textile patch antenna [PDF]
, 2014 A new textile wearable wireless node, for operation in the 2.45 GHz industrial, scientific and medical (ISM) band, is proposed. It consists of a dual-polarised textile patch antenna with integrated microcontroller, sensor, memory and transceiver with ...
Knockaert, Jos +4 more
core +2 more sources
Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma
Advanced Engineering Materials, EarlyView.The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie +4 more
wiley +1 more source
Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V
Advanced Engineering Materials, EarlyView.This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann +3 more
wiley +1 more source
Electronics LettersThis letter presents a Ku‐band horizontally polarized (HP) omnidirectional antenna based on single‐ridge trapezoidal waveguide (STW). Four groups of longitudinal slots are etched on a pair of back‐to‐back arranged STWs to achieve the HP omnidirectional ...
Kai Ye +4 more
doaj +1 more source