Results 41 to 50 of about 4,866 (225)

Approximate Analytical Technique to Design Reflectarray Antenna

Advanced Electromagnetics, 2016
This paper presents an analysis and design for a reflectarray antenna composed of an array of rectangular patches printed on a grounded dielectric slab.
H. M. Yamani, A. M. Attiya, A. K. Abdelmageed   +2 more
doaj   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Dipole‐Quadrupole Model and Multipole Analysis of Resonant Membrane Metasurfaces

Laser &Photonics Reviews, Volume 20, Issue 12, 18 June 2026.
Membrane metasurfaces, arrays of holes in a dielectric membrane, are appealing because they require no substrate and allow access to resonant near‐fields. However, developing a comprehensive theoretical description for them remains challenging. We introduce a semi‐analytical dipole‐quadrupole approach to analyze their resonant spectra at arbitrary ...
Izzatjon Allayarov, Andrey B. Evlyukhin, Antonio Calà Lesina   +2 more
wiley   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

Resonant Elements for Tunable Reflectarray Antenna Design

International Journal of Antennas and Propagation, 2012
This paper presents an accurate analysis of different configurations of reflectarray resonant elements that can be used for the design of passive and tunable reflectarrays.
M. Y. Ismail, M. Inam
doaj   +1 more source

Sub‐THz Multifunctional Metasurfaces for Independent Transmission or Reflection Phase Manipulation

Advanced Optical Materials, Volume 14, Issue 4, 27 January 2026.
This article presents a rigorous analysis, design, and characterization of a novel sub‐THz metalens and reflective metasurface. Unlike bulky optical systems, the proposed thin, planar metasurface enables dual‐band full‐space wavefront control, via low‐loss transmission and reflection phase tuning, offering compact integration and improved ...
Bilal Ouardi, Orestis Koutsos, Olivier de Sagazan, Malo Robin, Ronan Sauleau, Antonio Clemente   +5 more
wiley   +1 more source

A Scalable and Integrated Reconfigurable Intelligent Surface

Advanced Electronic Materials, Volume 12, Issue 1, 7 January 2026.
A scalable X‐band reconfigurable intelligent surface is presented using one‐bit phase‐tunable unit cells with integrated FPGA control. The RIS supports fast, high‐speed reconfiguration through WiFi, LAN, and USB interfaces and can be scaled to multiple tiles. The design achieves over 20 dBi broadside gain and reliable 2D beam steering in both elevation
Zaid Akram, Mostafa Elsayed, Hira Hameed, Mirza Shujaat Ali, Jalil ur Rehman Kazim, Muhammad Ali Imran, Qammer H. Abbasi   +6 more
wiley   +1 more source

Dual-Layer Single-Varactor Driven Reflectarray Cell for Broad-Band Beam-Steering and Frequency Tunable Applications

IEEE Access, 2018
A dual-layer active reflectarray configuration is proposed for broad-band beam-steering and/or frequency-tunable applications. A unit cell composed by two stacked fixed-size rectangular patches, properly loaded with a single varactor diode, is designed ...
Sandra Costanzo, Francesca Venneri, Antonio Raffo, Giuseppe Di Massa   +3 more
doaj   +1 more source

Three-dimensional accurate modeling of nematic liquid crystal based dipole unit for reconfigurable reflectarray at 100 GHz

New Journal of Physics, 2022
In this paper, a three-dimensional accurate modeling of nematic liquid crystal (LC) has been presented for the analysis of reconfigurable reflectarray cells based on LC.
Jin-Ling Geng, Lizhong Song
doaj   +1 more source

Wideband Circularly Polarized Dielectric Reflectarray Using Sequential Rotation of L‐Shaped Dielectric Resonators

Electronics Letters, Volume 62, Issue 1, January/December 2026.
An asymmetric L‐shaped dielectric Pancharatnam–Berry phase unit cell is proposed to enable CP‐preserving reflection with an intrinsic 180 phase difference between the orthogonal linear components. ABSTRACT In this work, we detail the design and experimental validation of a wideband circularly polarized dielectric reflectarray.
Kitch Mensah‐Bonsu, Binbin Yang
wiley   +1 more source