21 papers · ranked by Valyu relevance
Aqeel Hussain Naqvi, Sungjoon Lim
Owing to the rapid growth in wireless data traffic, millimeter-wave (mm-wave) communications have shown tremendous promise and are considered an attractive technique in fifth-generation (5G) wireless communication systems. However, to design robust communication systems, it is important to understand the channel…
Irene Merino-Fernandez, Sunil L. Khemchandani, Javier del Pino, Jose Saiz-Perez + 2 more
'Jose Saiz-Perez' 'Tiago Varum' 'Joao Nuno Matos'] Nowadays, mega-constellations of Low Earth Orbit (LEO) satellites have become increasingly important to provide high-performance Internet access with global coverage. This paper provides an updated comparison of four of the largest LEO mega-constellations: Telesat…
ByungKuon Ahn, In-June Hwang, Kwang-Seok Kim, Soo-Chang Chae + 2 more
'Jong-Won Yu' 'Han Lim Lee'] This paper presents a wide-angle scanning phased array antenna using high gain pattern reconfigurable antenna (PRA) elements. Using PRA elements is an attractive solution for wide-angle scanning phased array antennas because the scanning range can be divided into several subspaces. To…
Dongsheng Li, Jie Yang, Jianing Zhao, Yongzhen Dong + 8 more
'Tianming Li' 'Haiyang Wang' 'Biao Hu' 'Yihong Zhou' 'Fang Li' 'Ruoyang Yang' 'Paulo M. Mendes'] This paper introduces a novel single-layer microstrip patch element designed to achieve a wide beamwidth, in order to address the growing demand for wide-angle scanning capabilities in modern phased array systems. The…
J. Hanson
Phased array radar systems have a wide variety of applications in engineering and physics research. Phased array design usually requires numerical modeling with expensive commercial computational packages. Using the open-source MIT Electrogmagnetic Equation Propagation (MEEP) package, a set of phased array designs is…
Jia Ding, Huaizong Shao, Jianxing Lv, Fake Ding + 1 more
The design and application of broadband phased array RF links is a complex and highly precise endeavor. To achieve optimal performance, it is essential to compare and validate multiple schemes during the system design phase. Utilizing simulation models to simulate system structures and validate parameters can…
Cezar-Ion Adomnitei, Cezar-Eduard Lesanu, Adrian Done, Ang Yu + 4 more
LEO satellite constellations can provide a viable alternative to expand connectivity to remote, isolated geographical areas and complement existing IoT terrestrial communication infrastructures. This paper aims to improve LEO satellite communications by implementing a new phased antenna array system that can…
Alejandro Antón Ruiz, Samar Hosseinzadegan, John Kvarnstrand, Klas Arvidsson + 1 more
'Klas Arvidsson' 'Andrés Alayón Glazunov'] Abstract—In this paper, we propose quantifying the radiated power of phased arrays or, in general, directive antennas, by the Constrained-View Radiated Power (CVRP). The constrained view shall be interpreted here as the Field-of-View (FoV) of an antenna that defines a region…
Reza Karimian, Shahrokh Ahmadi, Mona Zaghloul, Sajjad Taravati
—This study presents a nonreciprocal-beam phasedarray antenna constituted of phase-gradient patch radiators integrated with transistor-based nonreciprocal phase shifters. Such an antenna exhibits different beams for transmission and reception states. The proposed phased-array antenna provides power amplification for…
Ze Yan, Naibo Zhang, Guangcun Shan
-This paper presents a novel planar phased array that can work in Ka band designed for two-dimensional scanning. A four-modes pattern reconfigurable element based on microstrip Yagi antenna is proposed, and then developed into the 4×4 phased array, in which two feed points are introduced to reduce sidelobe level (SLL).…
Lars Kuger, Aleksandar Ichkov, Petri Mähönen, Ljiljana Simić
—Exploiting multi-antenna technologies for robust beamsteering to overcome the effects of blockage and beam misalignment is the key to providing seamless multi-Gbps connectivity in millimeter-wave (mm-wave) networks. In this paper, we present the first large-scale outdoor mm-wave measurement study using a phased…
Brian Sanchez, Marco A. Panduro, David H. Covarrubias, Alberto Reyna + 2 more
'Elizvan Juárez' 'Pedro Pinho'] This paper presents the application of CORPS (coherently radiating periodic structures) for feeding CRA (concentric rings array) with a reduced number of phase shifters. The proposed design technique for the structure of concentric rings provides a better scanning capability with respect…
Revant Adlakha, M. Moghaddaszadeh, M. A. Attarzadeh, Amjad J. Aref + 1 more
'Mostafa Nouh'] Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and reception…
Xuesong Cai, Meifang Zhu, А. Е. Федоров, Fredrik Tufvesson
—Accurate characterization of large-scale antenna arrays is growing in importance and complexity for the fifthgeneration (5G) and beyond systems, as they feature more antenna elements and require increased overall performance. The full 3D patterns of all antenna elements in the array need to b e characterized because…
Jiayi Zhang, Haiguo Qin, Cong Pu, Ting Zhang + 2 more
Transcranial focused ultrasound (tFUS) is a promising non-invasive tool for precise deep-brain interventions, including neuromodulation, blood-brain barrier opening, and drug delivery. However, conventional rigid tFUS arrays suffer from poor skull conformity, compromising patient comfort and targeting precision, while…
Guohun Zhu, Alina Bialkowski, Stuart Crozier, Lei Guo + 3 more
To avoid death or disability, patients with brain injury should undertake a diagnosis at the earliest time and accept frequent monitoring after starting any medical intervention. This paper presents a novel approach to localize brain injury using the intersection of pairs of signals from symmetrical antennas based on…
suraj Manikandan, Jens Andreasen
This preprint has been retracted at the authors' request because of recently discovered fundamental errors and misrepresentation in the underlying data.This communication introduces a Ka-band phase shifter that leverages a blend of the donor polymer PM6 and non-fullerene acceptor (NFA) Y7 organic materials. The design…
Authors not listed
We demonstrate the numerical optimization and design of thermal emission metasurfaces that selectively radiate mid-infrared (mid-IR) circularly-polarized light. The proposed three-dimensional chiral structure, formed by the multilayer stacking of antenna elements, inherently exhibits circular polarization selectivity…
Ke Guo, Abderrahim Boualam, James D Manton, Christopher J Rowlands
We present a new interferometer concept called SWIFT, able to project arbitrary interference patterns constructed from small numbers of plane waves. SWIFT can control each plane wave’s orientation, intensity, polarization and phase using just a single galvanometric mirror. We demonstrate the application of SWIFT to…
Lindsay D. Waldrop, Yanyan He, Shilpa Khatri
A major transition in the history of the Pancrustacea was the invasion of several lineages of these animals onto land. We investigated the functional performance of odor-capture organs, antennae with olfactory sensilla arrays, through the use of a computational model of advection and diffusion of odorants to olfactory…
Authors not listed
Arrays of light harvesting molecules with long-range order hold promise as materials capable of efficient collection of photons as well as rapid transport of captured solar energy to chemical catalysts. Hydrogen-bonded organic frameworks (HOFs) could be promising artificial light-harvesting platforms, due to their…