Results 41 to 50 of about 3,736 (226)

Reflectarray antennas for dual polarization and broadband telecom satellite applications [PDF]

, 2015
A reflectarray antenna with improved performance is proposed to operate in dual-polarization and transmit-receive frequencies in Ku-band for broadcast satellite applications. The reflectarray element contains two orthogonal sets of four coplanar parallel
Boix, Rafael R., Encinar Garcinuño, José Antonio, Florencio Díaz, Rafael, Losada, Vicente, Toso, Giovanni   +4 more
core   +3 more sources

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

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

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

The socio-economic dimensions of the fisherman’s well-being at Batam Island: a descriptive survey [PDF]

, 2020
The well-being of the people is a fundamental part of a government's drive towards a developed nation. Indonesia's maritime community is one of the few minority communities that need attention in order to achieve Indonesia's balance of growth. Therefore,
Isa, Khairunesa, Palpanadan, Sarala Thulasi   +1 more
core   +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

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

Multi-Beam Radiation Intensity Control of a Reflectarray Antenna Using Unit Cell Arrangement [PDF]

Journal of Electromagnetic Engineering and Science
In this paper, multi-beam radiation intensity control of a reflectarray antenna by means of unit cell arrangement is proposed and investigated. A metasurface is designed to achieve reflection in a specific direction, and a circular ring structure with a ...
Jae-Gon Lee
doaj   +1 more source

High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays [PDF]

, 2016
A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we demonstrate a metasurface device that circumvents these limitations.
Aieta, Francesco, Capasso, Federico, Gabay, Ilan, Khorasaninejad, Mohammadreza, Kim, Myoung-Hwan, Mansuripur, Tobias, Rousso, David, She, Alan, Troccoli, Mariano, Wang, Xiaojun, Yu, Nanfang, Zhang, Shuyan   +11 more
core   +3 more sources