Results 31 to 40 of about 730 (253)
Applications of AMC-based impedance surfaces
EPJ Applied Metamaterials, 2018 The recent and major enhancements of artificial magnetic conductor (AMC) and their applications namely RCS reduction, low-profile antennas and holographic leaky wave antennas are reviewed.
Balanis Constantine A. +4 more
doaj +1 more source
Graphene-based Terahertz closed-stopband composite right/left-handed leaky-wave antennas [PDF]
E3S Web of Conferences, 2021 A simple scheme for the realization of the terahertz (THz) fundamental-mode closed-stopband composite right/left-handed leaky-wave antennas (CRLH LWAs) is presented.
Gao Muzhi +3 more
doaj +1 more source
Gap Waveguide Leaky-Wave Antenna
IEEE Transactions on Antennas and Propagation, 2016 A novel leaky wave antenna, realized using gap waveguide concept, is here proposed. Both, the feeding structure and the antenna are realized in groove gap waveguide technology, thus simplifying the whole structure. A complete design procedure, starting from a given groove waveguide to the final radiation mechanism, is described in this paper.
Vukomanovic, Mladen +4 more
openaire +4 more sources
DESIGN AND FABRICATION OF ULTRA-WIDEBAND LEAKY WAVE METAMATERIAL ANTENNAS [PDF]
Jordanian Journal of Computers and Information Technology, 2019 This article is devoted to the design, analysis and fabrication of conventional and metamaterial leaky wave antennas. The effects of utilizing composite right/left handed structure on bandwidth, gain and beam steering are reflected.
Mohamed Fathy Abo Sree +5 more
doaj +1 more source
Leaky Horns: A New Paradigm of Developing Electromagnetic Horns Based on Leaky-Wave Structures
Electromagnetic ScienceMore than one-century history of microwaves has witnessed two seemingly unrelated developments of leaky-wave and horn antennas. While conventional horns cannot be made free from phase error even though the optimum horn criterion is adopted, this problem ...
Dongze Zheng, Ke Wu, Wei Hong
doaj +1 more source
Flexible Design of Broadside-Radiating Linearly-Polarized Edge-Fed Metasurface Antennas
IEEE AccessIn this work, we design and fabricate broadside-radiating edge-fed metasurface antennas with linear polarization employing a spatially-varying isotropic reactance; in order to avoid losses, the antenna is not terminated on a matched load.
Lucia Teodorani +4 more
doaj +1 more source
Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
IEEE Access, 2019 In this paper, different reconfigurability mechanisms are proposed to scan the pointing direction at a fixed frequency of recently-proposed leaky-wave antennas based on omega-bianisotropic Huygens' metasurfaces.
Elena Abdo-Sanchez +2 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele +2 more
wiley +1 more source
Liquid Crystal-Based Wideband Reconfigurable Leaky Wave X-Band Antenna
IEEE Access, 2019 In this paper, a pattern and frequency reconfigurable leaky wave X-band antenna based on liquid crystal is designed. The frequency sweep characteristics of traditional leaky wave antennas are replaced by electrical properties of liquid crystal materials.
Di Jiang +7 more
doaj +1 more source