Results 61 to 70 of about 5,646 (202)

1‐Bit reconfigurable reflectarray antenna with T‐shaped parasitic structure

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
An electronically 1‐bit reconfigurable reflectarray antenna (RRA) with wide‐angle beam‐scanning and high efficiency performance is presented. A 180‐degree phase difference can be generated by controlling the state of the PIN dipole in the configurable element comprising a double split ring (DSR) patch and two T‐shaped parasitic structures.
Sen Li, Yang Cai, Hong Ma, Lijun Bu, Siyu Qi, Yufan Cao, Tao Wu   +6 more
wiley   +1 more source

A Dual Ka/Q-Band Reflectarray

Известия высших учебных заведений России: Радиоэлектроника, 2022
Introduction. Duplex satellite communication is commonly arranged using two spaced frequency bands, with one band receiving and the other band transmitting signals to a satellite.
S. V. Polenga, A. A. Erokhin, R. O. Ryazantsev, A. D. Poligina, R. M. Krylov, E. A. Litinskaya, E. R. Gafarov, A. M. Aleksandrin, Yu. P. Salomatov, I. Yu. Danilov   +9 more
doaj   +1 more source

An Inhomogeneously‐Loaded Diaphragm in a Microwave Rectangular Waveguide

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
This study presents a method to control resonant transmission in a dielectric‐loaded slot within a thick conducting diaphragm embedded in a rectangular waveguide. By introducing a gap with a different dielectric constant, we can manipulate the overlap of Fabry–Perot and Fano resonances, demonstrating potential applications as a bandpass filter with a ...
Abdulaziz H. Haddab, Edward F. Kuester
wiley   +1 more source

Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities

, 2020
Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.
ElMossallamy, Mohamed A., Han, Zhu, Li, Geoffrey Ye, Seddik, Karim G., Song, Lingyang, Zhang, Hongliang   +5 more
core  

Fully Controllable Beam‐Steering 1‐THz Transmitarray Using Graphene–Metal Hybrid Metasurface

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
The switchable hybrid graphene–metal transmiting metasurface. The transmitarray composed of the proposed metasurface, for beam steering, controlable by a microprocessing unit. ABSTRACT In this paper, a 1‐THz graphene–metal‐hybrid transmissive metasurface is proposed, which consists of six layers.
P. Hosseini, H. Oraizi
wiley   +1 more source

A reflectarray Using a Dielectric Discretized Concave Mirror Based on Electromagnetic Band Gap [PDF]

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a reflectarray antenna with an innovative dielectric mirror in the form of a discretized concave reflector. The mirror, manufactured via 3D printing, combines dielectric and air layers, forming an Electromagnetic Band Gap (EBG) that ...
Gustavo Maciulis Dip, Fatima Salete Correra   +1 more
doaj   +1 more source

Wide‐Angle Scanning Array With Sidelobe Reduction Using Single Substrate Layer

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
Without the need for amplitude weighting, the proposed array can achieve beam scanning from −70° to 70° with a gain fluctuation of less than 0.8 dB while maintaining sidelobe levels below −11 dB. The proposed array has the advantages of simple structure, wide beam coverage, low gain fluctuation, and low sidelobe level.
Shang‐Yang Li, Xiaoxue Fan, Yanni Wang, Xiaoting Ma, Yan Wang, Wangzhe Li   +5 more
wiley   +1 more source

Infrared polarizing reflectarray metasurfaces [PDF]

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
An infrared-frequency polarizing reflectarray is designed with a phase-amplitude synthesis method at 4μm wavelength. The proposed phase-amplitude synthesis method is based on the optimization of the axial ratio of the steered beam through the reflection phase and amplitude of reflectarray elements. The proposed reflectarray reradiates an incoming slant
Mehdi Veysi, Caner Guclu, Ozdal Boyraz, Filippo Capolino   +3 more
openaire   +1 more source

Performance Evaluation of a High-Gain Axisymmetric Minkowski Fractal Reflectarray for Ku-Band Satellite Internet Communication

Fractal and Fractional
In this article, a high-gain axisymmetric Minkowski fractal reflectarray is designed and fabricated for Ku-Band satellite internet communications. High gain is achieved here by carefully optimising the number of unit cells, their shape modifier, focal ...
Prabhat Kumar Patnaik, Harish Chandra Mohanta, Dhruba Charan Panda, Ribhu Abhusan Panda, Malijeddi Murali, Heba G. Mohamed   +5 more
doaj   +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