Results 71 to 80 of about 9,663 (287)

Wideband Radar Cross Section Reduction of Microstrip Patch Antenna using Polarization Converter Metasurface

, 2022
Antenna is the key device of communication on stealth platform. It is the greatest contributor to the overall RCS. So, it is desired to reduce the radar signature of the antenna.
Patel, Krunal, Joshi, Manjusha
core   +1 more source

A subcell based approach for enhancing the absorption bandwidth of microwave absorbers using printed periodic metallic geometries

Engineering Science and Technology, an International Journal, 2019
A broadband microwave absorber is designed using a two-layer periodic structure consisting of arrays of square metal patches and square loops. It has been shown through simulations and experiments that the bandwidth of the structure can be enhanced by ...
M.N. Sujatha, Vijeshree Kadiya
doaj   +1 more source

Schooling Trajectories and the Development of Brain Dynamics: A Comparative Study of Montessori and Traditional Education

Advanced Science, EarlyView.
We investigate whether Montessori and traditional schooling systems shape the developmental trajectory of large‐scale brain dynamics in different ways. We quantify the arrow of time (“non‐reversibility”) in neural activity during resting state and movie‐watching, revealing distinct maturational patterns.
Elvira del Agua, Anira Escrichs, Yonatan Sanz Perl, Morten L. Kringelbach, Adele Diamond, Solange Denervaud, Gustavo Deco   +6 more
wiley   +1 more source

A Prismatic Conformal Metasurface for Radar Cross-Section Reduction

, 2020
A prismatic conformal metasurface, based on optimized multielement phase cancellation (OMEPC), is proposed for wideband radar cross-section (RCS) reduction. The metasurface is composed of 35 lattices located in 7 zones of a prismatic structure.
Li, Zengrui, Guo, Qingxin, Song, Jiming, Su, Jianxun, Wang, Yajin   +4 more
core  

INDOOR RADAR CROSS SECTION MEASUREMENTS OF SIMPLE TARGETS DOI 10.5028/jatm.2012.04014711

Journal of Aerospace Technology and Management, 2012
This paper has described the radar absorbing materials characterization and radar cross section measurements, in the frequency range of 8 to 12 GHz, using a very simple setup.
Marcelo Alexandre Souza Miacci, Evandro Luís Nohara, Inácio Malmonge Martins, Guilherme Gomes Peixoto, Mirabel Cerqueira Rezende   +4 more
doaj  

Transferable Deep Reinforcement Learning With Edge‐Contour‐Depth Fusion for Autonomous Wireless Capsule Endoscopy Navigation

Advanced Science, EarlyView.
This study presents an anatomical landmark‐guided DRL framework for autonomous wireless capsule endoscopy navigation. Using a lightweight edge‐contour‐depth fusion module, it achieves over 97% coverage across diverse gastric anatomies. To ensure reliability, a two‐stage sim‐to‐real pipeline with an adaptive dynamic programming controller mitigates ...
Haoxuan Wu, Haitao Gao, Qingyang Liu, Sishen Yuan, Haiyang Fang, Mingwu Su, Baijia Liang, Yongzun Yang, Long Bai, Wenzhen Dong, Dihong Xie, Shijian Su, Jiewen Lai, Shing Shin Cheng, Zhen Li, Xiuli Zuo, Hongliang Ren   +16 more
wiley   +1 more source

In Situ Polyurea Integration for Self‐Healing, Durable Transparent Electromagnetic‐Interference Shielding Film

Advanced Science, EarlyView.
A steric‐hindrance molecular engineering strategy uses dimethyl maleate (DMM) to convert poly(1,4‐butanediol) bis(4‐aminobenzoate) (PBDAB) into a precursor with reduced reactivity via Michael addition, thereby retarding the curing process to form a transparent, ultraflexible, and self‐healable secondary‑amine polyurea (PuSA) with a crosslinked network.
Sinan Zheng, Shanyu Zhao, Gengjiang Yao, Yue Liu, Fei Pan, Mingrui Han, Zecheng Li, Shanbo Li, Jiurong Liu, Na Wu, Zhihui Zeng   +10 more
wiley   +1 more source

Radar cross section of conducting bodies of revolution coated by dielectric layer

Journal of Kufa-Physics, 2019
In this paper, the electromagnetic (EM) scattering from conducting bodies of revolution coated by dielectric layer was calculated by using moment of method with Galerkin's approach, and applying the equivalence principle to determine the electric and ...
Aqeel Sami Taher , Zeki Abdullah Ahmed, Rua’a Raheem Helan   +2 more
doaj   +1 more source

Silicon‐Embedded Multifunctional Heterogeneous Integration for Miniaturized Photoplethysmography Detection Devices

Advanced Science, EarlyView.
ABSTRACT The multifunctional integration of chips with high flexibility and scalable manufacturing is crucial for enhancing chip performance, reducing chip size, and simplifying chip design. However, balancing volume, cost, flexibility, and functionality using traditional heterogeneous integration methods is challenging.
Lang Chen, Shizun Hu, Zhou Yang, Shitao Shen, Pan Zhang, Han Xu, Chi Zhang, Wei Wang   +7 more
wiley   +1 more source

Polarization dependent 1-bit coding metamaterial for radar cross section reduction in microwave frequency applications

Ain Shams Engineering Journal
The main focus of this investigation was the construction of three kinds of distinctive structures, such as conventional coding metamaterial, tailored metamaterial, and combined coding metamaterial designs at lower microwave frequencies. All of the 1-bit
Tayaallen Ramachandran, Mohammad Rashed Iqbal Faruque   +1 more
doaj   +1 more source