Results 41 to 50 of about 911 (207)

Radiation Characteristics Enhancement of Dielectric Resonator Antenna Using Solid/Discrete Dielectric Lenses

Advanced Electromagnetics, 2015
The radiation characteristics of the dielectric resonator antennas (DRA) is enhanced using different types of solid and discrete dielectric lenses. One of these approaches is by loading the DRA with planar superstrate, spherical lens, or by discrete lens
H. A. E. Malhat, S. H. Zainud-Deen, W. M. Hassan, K. H. Awadalla   +3 more
doaj   +1 more source

A tiled dual-polarized transmitarray with 1-bit quantization

, 2020
An original approach of a transmitarray which consists of the tiled unit cells placed in a plastic holder is considered. Each unit cell represents a passive receiver-transmitter structure with integrated phase-shifter, which can take either of two coding
Munina, I., Kirillov, V., Kirillov , V., Verevkin, A., Turalchuk, P., Zelenchuk, D.; id_orcid   +5 more
core   +1 more source

Detection of low-contrast objects with a focusing transmitarray [PDF]

2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2017
A Focusing Transmitarray is a quasi-periodic planar lens that is able to focus the energy of a feed at a spot in the Near Field of the lens. In this work, this kind of lens has been used for detection under low contrast conditions. The use of this lens allows non-contact measurements, therefore increasing the sensitivity of a detection system.
León Fernández, Germán, González Plaza, Enrique, Loredo Rodríguez, Susana, Rodríguez Pino, Marcos   +3 more
openaire   +2 more sources

1-bit reconfigurable transmitarray with low loss and wide bandwidth

New Journal of Physics, 2021
We present a novel X-band 1-bit reconfigurable transmitarray with excellent polarization conversion. The basic element consists of two layers of metal patterns connected by a metal through-hole and feed structures.
Wen Hua Gao, Mao Chen, Qiang Cheng, Rui Wen Shao, Jing Cheng Liang, Yuan Gao, Tie Jun Cui   +6 more
doaj   +1 more source

Double-Layer Ku/K Dual-Band Orthogonally Polarized High-Efficiency Transmitarray Antenna

IEEE Access, 2021
This paper presents a double-layer, dual-band, orthogonally polarized, highly efficient transmitarray antenna (TA) operated in the Ku/K band (14 GHz/20 GHz) for millimeter wave (MMW) wireless communication systems (WCS).
MingBo Cai, Zehong Yan, Fangfang Fan, Shuyang Yang, Xi Li   +4 more
doaj   +1 more source

The Shape Synthesis of Transmitarray Antenna Elements

, 2020
Shape synthesis (also called topological synthesis or inverse design in other disciplines) has the potential to provide antenna engineers with a useful addition to their design tools. Transmitarray antennas, which consist of a feed antenna plus a printed
Aljanah, Abdullah Saad A
core   +1 more source

One-Dimensional Beam Scanning Transmitarray Lens Antenna Fed by Microstrip Linear Array

IEEE Access, 2019
This paper proposed a one-dimensional beam scanning transmitarray lens antenna fed by a microstrip linear array antenna which owns a wide pattern in the plane orthogonal to the array axis and a narrow pattern in the plane that includes the array axis ...
Na Kou, Shixing Yu, Zhao Ding, Zhengping Zhang   +3 more
doaj   +1 more source

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

Millimetre-Wave Multi-Beam Shaped Transmitarray with A Wide Beam Coverage [PDF]

, 2022
A millimeter-wave (mm-wave) shaped transmitarray for wide-angle multi-beam radiations is proposed at 70.5 GHz in this paper. The transmitting surface shows a three-dimensional (3-D) elliptical cylindrical configuration.
Guo, YJ, Qin, P-Y
core   +1 more source

Wideband Single‐Layer Reflectarray Antenna for Millimeter‐Wave 5G Communications

Journal of Sensors, Volume 2026, Issue 1, 2026.
The rapid evolution of intelligent applications has driven the demand for high‐performance antenna systems. Reflectarrays (RAs), also referred to as planar reflectors, have emerged as a promising solution for modern wireless and satellite communication systems due to their beam‐steering capability and high‐gain characteristics.
S. D. Khan, M. I. Abbasi, I. M. Ibrahim, N. H. Sulaiman, M. H. Dahri, M. A. Humayun, Hela Elmannai, Deepali   +7 more
wiley   +1 more source