Results 81 to 90 of about 240,167 (319)

Noise-Type Radars: Probability of Detection vs. Correlation Coefficient and Integration Time [PDF]

, 2022
David Luong, Bhashyam Balaji, Sreeraman Rajan   +2 more
openalex   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Grounded L-Shaped Corner-Embraced Patch Array Polarization Conversion Metasurface Compatible with Multiband and Broadband Characteristics

Micromachines
We propose a linear polarization rotator metasurface composed of a grounded array of L-shaped corner-embraced patches. Both simulation and experimental results confirm that the metasurface achieves a polarization conversion ratio exceeding 90% across ...
Shi Kong, Yifei Zhang, Ziheng Fu, Rui Yang   +3 more
doaj   +1 more source

Accurate detection of moving targets via random sensor arrays and Kerdock codes

, 2013
The detection and parameter estimation of moving targets is one of the most important tasks in radar. Arrays of randomly distributed antennas have been popular for this purpose for about half a century.
Strohmer, Thomas, Wang, Haichao
core   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

Advanced Materials Technologies, EarlyView.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk, Senentxu Lanceros‐Mendez, Abílio Pereira Silva   +2 more
wiley   +1 more source

Forked-Crossing Metasurface for Multi-Band Polarization Conversion with Distinct Bandwidths

Micromachines
This study presents a reflective and highly efficient multi-band metasurface polarization converter based on a forked-crossing patch array. Both simulation and experimental results reveal that such a metasurface achieves polarization conversion ratio ...
Pengpeng Zhang, Yifei Zhang, Ziang Li, Rui Yang   +3 more
doaj   +1 more source

Breast cancer tumour detection using microwave radar techniques [PDF]

, 2004
A breast cancer detection technique using multi-static radar is proposed herein. Images of a breast tumour are produced using this technique, with backscatter data. A wideband antenna design suitable for a breast cancer detection system is also described.
Benjamin, R, Craddock, IJ, Leendertz, J, Nilavalan, R, Preece, A   +4 more
core  

Monitoring autumn agriculture activities using Synthetic Aperture Radar (SAR) and coherence change detection [PDF]

, 2023
Laura Dingle Robertson, Heather McNairn, Marco van der Kooij, Xianfeng Jiao, Samuel Ihuoma, Pamela Joosse   +5 more
openalex   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

An EMD Based Sense-Through-Foliage Target Detection UWB Radar Sensor Networks

IEEE Access, 2018
In this paper, we propose an empirical mode decomposition (EMD)-based approach to ultra wide band radar for sense-through-foliage target detection. When the radar signal quality is good, the EMD-based target detection approach performs well by comparing ...
Ganlin Zhao, Qilian Liang, Tariq S. Durrani   +2 more
doaj   +1 more source