Results 61 to 70 of about 140,738 (213)

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

Reflectarray Membrane Study for Deployable SAR Antenna [PDF]

, 2009
In this paper a reflectarray design for a membrane spaceborne antenna to be used in a typical SAR mission is presented. An L-Band reflectarray, with a dimension of 10 by 6 meters on Kapton foil substrate, has been designed.
Di Maria, Alberto, Horn, Ralf, Reigber, Andreas, Limbach, Markus   +3 more
core  

Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats

IEEE Access
This paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer worldwide coverage of wireless communication and earth observation; high-gain antennas are ...
Masato Machida, Takashi Tomura, Hiraku Sakamoto, Tomohiro Fukao   +3 more
doaj   +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, F. Venneri, G. Di Massa, A. Borgia, A. Raffo   +4 more
doaj  

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

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, M. Arrebola, R. G. Ayestarán, F. Las-Heras   +3 more
doaj   +1 more source

Design of a High‐Gain H‐Shaped 1‐Bit Linearly Polarised Reconfigurable Intelligent Surface for Single and Multibeam Scanning

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This study introduces a compact H‐shaped 1‐bit linearly polarised Reconfigurable Intelligent Surface (RIS) prototype, specifically engineered for high‐gain and beam‐scanning applications at 5.1 GHz. The fabricated 20 × 20 RIS array exhibited a gain of 23.1 dBi, a scanning capability of ± 60° and an aperture efficiency of approximately 57%, as validated
Rocky Chakma, Jie Tang, Zijun Yan, Yongan Feng, Guohao Chen   +4 more
wiley   +1 more source

A Frequency‐Reconfigurable Dual‐Band Nematic Liquid‐Crystal Reflectarray Antenna With Angular Beam Separation for Satellite Communication

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This paper presents a frequency‐reconfigurable dual‐band nematic liquid‐crystal (LC) reflectarray antenna with angular beam separation for satellite communication. Dual‐band operation at 12 and 28 GHz is achieved through voltage‐controlled reconfiguration of the LC layer.
Hsi‐Hsir Chou, Ping‐Hsun Tsai, T. D. Wilkinson, Wing‐Kit Choi   +3 more
wiley   +1 more source

Development of Efficient Techniques for the Analysis and Design of Antennas in Dual-Reflectarray Configuration [PDF]

, 2012
This thesis contributes to the analysis and design of printed reflectarray antennas. The main part of the work is focused on the analysis of dual offset antennas comprising two reflectarray surfaces, one of them acts as sub-reflector and the second one ...
Tienda Herrero, Carolina
core   +1 more source

Feed system optimization for Convex Conformal Reflectarray Antennas

, 2017
In this communication, the possibility of enhancing the performances of Convex conformal Reflectarray Antennas (CRA) adopting an ad-hoc feed system properly designed is investigated.
M Beccaria, G Virone, F Calignano, M Orefice, G Addamo, OA Peverini, D Manfredi, P Pirinoli   +7 more
core   +2 more sources