Results 31 to 40 of about 409 (184)

Dual-Layer Beamscanning Reflectarray Antenna Operating at Ku-Band

Journal of High-Frequency Communication Technologies, 2023
This paper presents a beam scanning electronically reconfigurable reflectarray configuration for Ku-band applications using a single varactor diode.  A 15×15 center-fed reconfigurable reflectarray antenna is designed consisting of 225 octagonal shaped ...
Vidhyashree Suresh, Aishika Bhattacharjee, Kirubaveni Savarimuthu   +2 more
doaj   +1 more source

Radiation Analysis and Characteristics of Conformal Reflectarray Antennas

International Journal of Antennas and Propagation, 2012
This paper investigates the feasibility of designing reflectarray antennas on conformal surfaces. A generalized analysis approach is presented that can be applied to compute the radiation performance of conformal reflectarray antennas.
Payam Nayeri, Fan Yang, Atef Z. Elsherbeni   +2 more
doaj   +1 more source

Dipole‐Quadrupole Model and Multipole Analysis of Resonant Membrane Metasurfaces

Laser &Photonics Reviews, EarlyView.
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

Dual-Band Frequency Selective Surface-Backed Reflectarray for High-Speed Ka-Band Satellites

Applied Sciences
A dual-band, dual-polarized frequency selective surface (FSS)-backed multilayer reflectarray antenna is designed for 5G high-speed satellites operating at Ka-band uplink and downlink frequencies (20/30 GHz).
Ahmet Hulusi Gülseren, Aytaç Alparslan, Nurhan Türker Tokan   +2 more
doaj   +1 more source

Efficient Design of the Microstrip Reflectarray Antenna by Optimizing the Reflection Phase Curve

International Journal of Antennas and Propagation, 2016
The microstrip reflectarray antenna is an attractive directional antenna combining advantages of both the reflector and the microstrip array antenna. For the design of this kind of antenna, the conventional method, which is based on the reflection phase ...
Xing Chen, Qiang Chen, Pan Feng, Kama Huang   +3 more
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

A circularly polarized folded reflectarray antenna using a polarization-sensitive linear-to-circular polarization converter

Frontiers in Physics, 2022
This work proposes a low-profile circularly polarized folded reflectarray antenna (CPFRA). Compared to traditional CPFRA that comprise the main reflectarray, a polarization grid (PG), and a linear-to-circular polarization (LP-CP) converter, the proposed ...
Shuang Liu, Yin Li, Sai-Wai Wong, Xiao Zhang, Shiyan Wang, Liang Fang, Qiang Gao   +6 more
doaj   +1 more source

Geometric Phase Metasurface for Lens Antenna System With High Polarisation Purity and Efficiency

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This work presents a millimetre‐wave antenna–metalens system based on the Pancharatnam–Berry phase principle, operating efficiently from 82 to 95 GHz. The system achieves high directivity (up to 34.7 dB), excellent polarisation purity (AR < 2 dB) and aperture efficiency exceeding 30%. The same metalens is also characterised at 75 and 105 GHz, where the
Alexia Moreno‐Peñarrubia, Sheyly Ortiz‐Reyes, Jorge Teniente, Sergei Kuznetsov, Bakhtiyar Orazbayev, Miguel Beruete   +5 more
wiley   +1 more source