Results 41 to 50 of about 435 (182)

A 1-Bit Electronically Reconfigurable Reflectarray Antenna in X Band

IEEE Access, 2019
In this paper, a fully electronically reconfigurable reflectarray antenna that has 14×14 reflecting elements and features a higher aperture efficiency was designed, fabricated, and tested.
Hai Zhang, Xuxiang Chen, Zhenglong Wang, Yuehe Ge, Jixiong Pu   +4 more
doaj   +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

Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization

Advanced Functional Materials, Volume 36, Issue 53, 2 July 2026.
We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat, Alexander Peraire‐Bueno, A. John Hart, Randall M. Erb   +3 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

Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications

Journal of Electrical and Computer Engineering, 2013
An electronically tunable reflectarray element is proposed in this work to design beam-steering antennas useful for radar applications. A reduced size reflectarray unit cell is properly synthesized in order to extend the antenna beam scanning ...
F. Venneri, S. Costanzo, G. Di Massa
doaj   +1 more source

Design and Analysis of Square and Torus ring Shaped Material - Unit cells for X-Band Reflectarray [PDF]

EPJ Web of Conferences
A Reflectarray antenna is considered a hybrid antenna fed with microstrip, and elements of the antenna are designed to comprise features of both reflector and phased array antennas.
Chitra S., Aishwarya L. K., Hema R., Sundararajan M.   +3 more
doaj   +1 more source

Enhanced Efficiency and Reduced Side Lobe Level Convex Conformal Reflectarray

Applied Sciences, 2021
In this work, the design of a convex conformal reflectarray (CRA), suitable to be used for high gain on board antenna in mobile communication systems, is presented.
Michele Beccaria, Giuseppe Addamo, Mario Orefice, Oscar Peverini, Diego Manfredi, Flaviana Calignano, Giuseppe Virone, Paola Pirinoli   +7 more
doaj   +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

Multi-Beam Circular Polarized Reflectarray on Parabolic Reflector by Variable Rotation Technique

Applied Sciences, 2019
Multi-beams antennas are currently being used for direct broadcast satellite, personal communication satellite, military communication satellite, and high-speed internet applications.
Álvaro Somolinos, Rafael Florencio, Iván González, Felipe Cátedra   +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