Results 21 to 30 of about 4,866 (225)

A novel broadband reflectarray antenna employing equivalent magnetic dipole elements. [PDF]

Sci Rep
Li S, Cai Y, Ma H, Bu L, Qi S, Cao Y, Wu T.   +6 more
europepmc   +3 more sources

Broadband single-layer reflectarray antenna loaded with meander-delay-lines for X-band applications

Alexandria Engineering Journal, 2021
In this work, delay-lines loaded broadband reflectarray antenna is proposed for X-band applications. The array cells contain slotted square patch and quad meander delay-lines.
Tayyab Shabbir, Mohammad Tariqul Islam, Norbahiah Misran, Samir Salem Al-Bawri, Simranjit Singh   +4 more
doaj   +1 more source

Analysis and Elimination of Unwanted Resonances for Wideband Reflectarray Antenna Design at Sub-Millimeter Waves

IEEE Access, 2020
In this study, unwanted additional resonances are analyzed and a method is developed to eliminate them for wideband offset dual reflectarray antenna at sub-millimeter waves.
Eun-Cheol Choi, Sangwook Nam
doaj   +1 more source

Terahertz Beam Steering Using a MEMS-Based Reflectarray Configured by a Genetic Algorithm

IEEE Access, 2022
With the increase in potential uses of terahertz technology, the need for terahertz transceivers with application-oriented adaptive radiation patterns has emerged.
Xuan Liu, Lisa Schmitt, Benedikt Sievert, Jonas Lipka, Chong Geng, Kevin Kolpatzeck, Daniel Erni, Andreas Rennings, Jan C. Balzer, Martin Hoffmann, Andreas Czylwik   +10 more
doaj   +1 more source

Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes

IEEE Access, 2021
Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band
Keisuke Omoto, Takashi Tomura, Hiraku Sakamoto   +2 more
doaj   +1 more source

BANDWIDTH CONSIDERATIONS FOR A MICROSTRIP REFLECTARRAY [PDF]

Progress In Electromagnetics Research B, 2008
The paper describes a theoretical investigation into a limited bandwidth operation of a microstrip reflectarray. Two main factors limiting the bandwidth are considered. One is related to the requirement of phase compensation to convert a spherical wavefront launched by a feed into a planar wavefront. The other one is linked to the limited phasing range
Bialkowski, M.E., Sayidmarie, K.H.
openaire   +3 more sources

An Efficiency-Improved Tightly Coupled Dipole Reflectarray Antenna Using Variant-Coupling-Capacitance Method

IEEE Access, 2020
In this paper, a tightly coupled dipole reflectarray antenna as well as a variant-coupling-capacitance method to improve the antenna aperture efficiency is presented.
Jiayou Wang, Yonggang Zhou, Steven Gao, Qi Luo   +3 more
doaj   +1 more source

Radiation Analysis and Characteristics of Conformal Reflectarray Antennas

International Journal of Antennas and Propagation, 2012
This paper investigates the feasibility of designing reflectarray antennas on conformal surfaces. A generalized analysis approach is presented that can be applied to compute the radiation performance of conformal reflectarray antennas.
Payam Nayeri, Fan Yang, Atef Z. Elsherbeni   +2 more
doaj   +1 more source

A Review of Wideband Reflectarray Antennas for 5G Communication Systems

IEEE Access, 2017
The advancement in the current communication technology makes it incumbent to analyze the conventional features of reflectarray antenna for future adaptability.
Muhammad Hashim Dahri, Mohd Haizal Jamaluddin, Muhammad Inam Abbasi, Muhammad Ramlee Kamarudin   +3 more
doaj   +1 more source

Characterization of Transmission and Reflection of Ku Band Split Ring Resonator Reflectarray using Waveguide Method

Advanced Electromagnetics, 2019
In this paper, the analysis, design, and measurement of a split ring resonator reflectarray is presented. The 6 different designs of reflectarray are simulated to analyze the effect of splits position on resonance frequency.
N. Naseer, B. Saka
doaj   +1 more source