Results 1 to 10 of about 5,577 (134)

Isolation Improvement in Reflectarray Antenna-Based FMCW Radar Systems [PDF]

open access: yesSensors, 2022
This paper presents an optimization of reflectarray-based RF sensors for detecting UAV and human presence. Our previous human detection radar system adapted a center-fed reflectarray antenna to a commercially available radar system, successfully ...
Hesham Yamani, Jihwan Yoon
doaj   +2 more sources

Analysis and Design of an X-Band Reflectarray Antenna for Remote Sensing Satellite System [PDF]

open access: yesSensors, 2022
This paper presents the analysis and design of an X-band reflectarray. The proposed antenna can be used for a medium Earth orbit (MEO) remote sensing satellite system in the 8.5 GHz band.
Shimaa A. M. Soliman   +2 more
doaj   +2 more sources

Exploring the Beam Squint Effects on Reflectarray Performance: A Comprehensive Analysis of the Specular and Scattered Reflection of the Unit Cell [PDF]

open access: yesSensors
In this article, the phenomena of beam deviation in reflectarray is discussed. The radiation pattern of the unit cell, which plays a vital role in shaping the beam of the reflectarray, is analyzed by considering undesired specular and scattered ...
Manzoor Elahi   +3 more
doaj   +2 more sources

Design and Analysis of Wideband Single-Layer Reflectarray Antenna for Remote Sensing and Environmental Monitoring [PDF]

open access: yesSensors
In this article, a wideband single-layer reflectarray antenna for Ku-band applications is presented. The proposed reflectarray antenna is suitable for applications such as fixed satellite service (FSS), broadcasting satellite service (BSS), earth ...
Annal Joy J   +4 more
doaj   +2 more sources

Single-Layer Metasurface-Based Reflectarray Antenna with H-Shaped Slotted Patch for X-Band Communication [PDF]

open access: yesNanomaterials
In this study, a metasurface-based reflectarray is designed for X-band applications. The unit cells are equipped with an H-shaped slotted patch for additional resonance and phase range.
Jawad Ali, Ashfaq Ahmad, Dong-you Choi
doaj   +2 more sources

A 3D-Printed Bi-Material Bragg-Based Reflectarray Antenna [PDF]

open access: yesSensors
This paper presents a 3D-printed fully dielectric bi-material reflectarray with bandgap characteristics for multi-band applications. To achieve bandgap characteristics, a “1D Bragg reflector” unit cell is used.
Walid Chekkar   +6 more
doaj   +2 more sources

Design and implementation of multi-band reflectarray metasurface for 5G millimeter wave coverage enhancement [PDF]

open access: yesScientific Reports
A compact low-profile multi-band millimeter-wave (mm-wave) reflectarray metasurface design is presented for coverage enhancement in 5G and beyond cellular communication.
Bilal Tariq Malik   +2 more
doaj   +2 more sources

Unfermented Freeze-Dried Leaf Extract of Tongkat Ali (Eurycoma longifolia Jack.) Induced Cytotoxicity and Apoptosis in MDA-MB-231 and MCF-7 Breast Cancer Cell Lines [PDF]

open access: yes, 2021
possible anticancer mechanism of action against breast cancer cell lines: non-hormone-dependent MDA-MB-231 and hormonedependent MCF-7. -e leaves of E.
Abdul Aziz, Zaleha   +3 more
core   +1 more source

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

open access: yesAlexandria 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   +4 more
doaj   +1 more source

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

open access: yesIEEE 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   +10 more
doaj   +1 more source

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