Broadband electronically tunable reflectionbased phase shifter for active-steering microwave reflectarray systems in Ku-band [PDF]
, 2016 This document provides the design of an electronically reconfigurable microwave phase shifter for reflectarray systems. The phase shifter is based on a hybrid coupler with reflective circuits in three ports.
Fernández González, José Manuel +4 more
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Single‐Layer Reflectarray Providing Broadband Linear‐to‐Circular Polarization Conversion
Microwave and Optical Technology Letters, Volume 67, Issue 2, February 2025.ABSTRACT This paper introduces a single‐layer reflectarray (RA) design capable of converting incoming linearly polarized waves into outgoing circularly polarized ones while focusing the beam. The design employs nonresonant unit cells, extending the classical concept of meander‐line polarizers.
Samara Gharbieh +4 more
wiley +1 more source
Bandwidth Performances of Reconfigurable Reflectarrays: State of Art and Future Challenges [PDF]
Radioengineering, 2018 Reconfigurable antennas allow to meet the increasing demands of modern RF communication systems for reconfiguration capabilities, such as beam-steering, multi-band operation, polarization flexibility or frequency agility.
S. Costanzo +4 more
doaj
Systematic Framework for Reflectarray Synthesis Based on Phase Optimization
International Journal of Antennas and Propagation, 2012 A new systematic synthesis framework for reflectarray antennas is discussed. Optimization based on the Levenberg-Marquardt algorithm is used to obtain the phase distribution of the reflection coefficients required on the reflectarray surface, in order to
J. Álvarez +3 more
doaj +1 more source
, 2020 Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.
ElMossallamy, Mohamed A. +5 more
core
A Dual-Polarized Reconfigurable Reflectarray Antenna Based on a Symmetrically Rotated Sub-Array [PDF]
, 2023 Sun‐Gyu Lee, Jeong‐Hae Lee
openalex +1 more source
A Ka-Band Cylindrical Paneled Reflectarray Antenna [PDF]
Electronics, 2019 Cylindrical parabolic reflectors have been widely used in those applications requiring high gain antennas. Their design is dictated by the geometric relation of the parabola, which relate the feed location, f, to the radiating aperture, D. In this work, the use of reflectarrays is proposed to increase D without changing the feed location.
greco francesco +3 more
openaire +1 more source
An Inhomogeneously‐Loaded Diaphragm in a Microwave Rectangular Waveguide
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.This study presents a method to control resonant transmission in a dielectric‐loaded slot within a thick conducting diaphragm embedded in a rectangular waveguide. By introducing a gap with a different dielectric constant, we can manipulate the overlap of Fabry–Perot and Fano resonances, demonstrating potential applications as a bandpass filter with a ...
Abdulaziz H. Haddab, Edward F. Kuester
wiley +1 more source
Fully Controllable Beam‐Steering 1‐THz Transmitarray Using Graphene–Metal Hybrid Metasurface
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.The switchable hybrid graphene–metal transmiting metasurface. The transmitarray composed of the proposed metasurface, for beam steering, controlable by a microprocessing unit. ABSTRACT In this paper, a 1‐THz graphene–metal‐hybrid transmissive metasurface is proposed, which consists of six layers.
P. Hosseini, H. Oraizi
wiley +1 more source
Keberkesanan program industrial skills enhancement programme (INSEP) dalam membantu peningkatan kemahiran kebolehpekerjaan peserta program di pusat pembangunan kemahiran negeri [PDF]
, 2006 Pengangguran di kalangan siswazah merupakan satu masalah global dan ia menjadi satu isu yang hangat diperdebatkan di Malaysia baru-baru ini. Salah satu langkah untuk mengatasi masalah ini ialah dengan melaksanakan program Industrial (INSEP) di Malaysia ...
Hai Kelian, Virakwan
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