Results 31 to 40 of about 435 (182)

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

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

Broadband Near‐Field Computational Microwave Imaging Enabled by Nonperiodic Dispersive Unit‐Cell Loading in a Passive Metasurface

Advanced Electronic Materials, EarlyView.
A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif, Firas Slewa Dawod, Henrik Jansen, Caner Kadıoğlu, Sayan Roy, Dirk Heberling, Renato Negra   +6 more
wiley   +1 more source

Breaking Optical Transparency and Electromagnetic Performance Trade‐Offs for Transparent Reflective Metasurfaces

Advanced Optical Materials, Volume 14, Issue 40, 27 October 2026.
A theory‐guided magnetoelectric metasurface design breaks the conventional optical transparency and electromagnetic performance trade‐offs. By preserving the electric and magnetic current paths required for efficient reflection through fine‐metal‐line structure, the developed transparent reflective metasurface achieves high optical transparency without
Mina Feizi, Shu‐Lin Chen, Geng‐Bo Wu, Li‐Zhao Song, Pei‐Yuan Qin, Y. Jay Guo   +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

Broadband Silicon‐On‐Glass Reflective Dielectric Metasurface for THz Beam Steering in 6G Wireless Networks

Advanced Functional Materials, Volume 36, Issue 75, 17 September 2026.
A CMOS‐compatible, all‐dielectric Silicon‐on‐Glass reflective metasurface enables low–loss terahertz wavefront control for future 6G wireless communication. Mie‐resonant silicon pillars provide full phase coverage near 500 GHz, achieving experimentally validated single‐, dual‐, and five‐beam steering with sub‐1.5° angular error and less than 3 dB ...
Rithwik Premanand, Yi Ji Tan, Thomas CaiWei Tan, Prakash Pitchappa, Hemanth Kumar Cheemalamarri, A. S. Madhukumar, Ranjan Singh   +6 more
wiley   +1 more source

Coating‐Free Nanoscratching for Liquid‐Crystal Alignment on PCB‐Compatible Millimeter‐Wave Reflective Unit Cells

Advanced Materials Technologies, Volume 11, Issue 18, 18 September 2026.
Direct nanoscratching with a 500 nm diamond lapping film creates groove‐guided liquid‐crystal alignment interfaces on PCB‐compatible Cu‐patterned RF substrates within minutes, eliminating polymer coating and high‐temperature baking. The coating‐free process enables optical/molecular alignment validation and voltage‐programmable 28 GHz reflection‐phase ...
Junseok Ma, Ga‐Yeong Park, Geunjung Lee, Hyo‐Won Lee, Jong‐Won Yu, Dong Ki Yoon   +5 more
wiley   +1 more source

Neural Network Characterization of Reflectarray Antennas

International Journal of Antennas and Propagation, 2012
An efficient artificial neural network (ANN) approach for the modeling of reflectarray elementary components is introduced to improve the numerical efficiency of the different phases of the antenna design and optimization procedure, without loss in accuracy.
A. Freni, MUSSETTA, MARCO, PIRINOLI, Paola   +2 more
openaire   +2 more sources

Noninvasive Intelligent Brain‐Metasurface System for Real‐Time Electromagnetic Wave Manipulation

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
A noninvasive intelligent brain–computer interface (BCI) is integrated with a reconfigurable metasurface to establish a direct neural‐to electromagnetic transduction pathway for real time, multimodal wave control. By combining convolutional‐neural‐network‐based decoding of motor‐imagery electroencephalography (EEG) signals with threshold‐based ...
Xiao Hai, Ruiyang Shen, Xiaoyi Wang, Guo‐Min Yang   +3 more
wiley   +1 more source