Results 51 to 60 of about 3,736 (226)

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

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

Penghasilan panduan keselamatan industri bagi kegunaan bakal graduan Kejuruteraan Elektrik Politeknik [PDF]

, 2003
Panduan keselamatan industri merupakan satu bentuk bimbingan yang penting kepada pelajar supaya mereka dapat mengetahui dengan jelas tentang amalan dan pengurusan keselamatan keija.
Wan Mahmud, Wan Mahzhir
core  

Robot creativity: humanlike behaviour in the robot-robot interaction [PDF]

, 2020
Artificial Intelligence development is mainly directed toward imitat­ing human reasoning and performing different tasks. For that purpose, related software and program solution where artificial intelligence is used have mostly thinking abilities. However,
Md Tomari, Mohd Razali, Predrag, K. Nikolic   +1 more
core  

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

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

Do We Really Need Frequency‐Selective Surface and Metasurface Reflectors for Antenna Gain Enhancement, or Are Metallic Reflectors Enough?

International Journal of Antennas and Propagation, Volume 2026, Issue 1, 2026.
Enhancing antenna gain remains a key requirement in modern wireless systems, particularly with the rapid evolution of 5G, emerging 6G networks, satellite links, and high‐resolution radar. Recent research trends increasingly rely on frequency‐selective surfaces (FSSs) and metasurface‐based reflectors, which offer precise electromagnetic wave control ...
A. J. A. Al-Gburi, Mohammad Rezwan Habib
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

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

Study of bifocal dual reflectarray configurations for multi-beam antennas in ka-band [PDF]

, 2017
This paper describes the design of multi-beam dual reflectarray antennas for operation in the Ka-band satellite transmission band (around 20 GHz), using the bifocal design concept to improve antenna performance.
Antonio Pino, Ciaran Geaney, Eduardo Martinez-de-Rioja, Jose A. Encinar, Sean V. Hum   +4 more
core   +2 more sources