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Beyond 5G networks would require newer technologies to deliver a smarter network. In accordance with these requirements, an electronically steerable compact antenna system capable of beam-switching in the azimuth plane is proposed. The design uses a monopole antenna as the main radiator surrounded by metasurface-based electronically reconfigurable reflector elements designed for the sub-6GHz range. The reflector elements use a reconfigurable capacitively loaded loop (CLL) which can be electronically activated to work as an artificial magnetic conductor (AMC). The design offers a digitally controllable directional radiation pattern covering all 360° in the azimuth plane with a step-size of 30°, a directional gain of dBi and a high front-to-back lobe ratio (FBR) of dB. The compact and modular nature of the design combined with the use of commercial off-the-shelf (COTS) components and 3D-printing makes the design low-cost and easier to integrate with various internet of thing (IoT) applications.
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http://dx.doi.org/10.1016/j.isci.2022.105549 | DOI Listing |
Sci Rep
August 2025
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China.
This study proposes an integrated framework that combines Axiomatic Design with Model-Based Systems Engineering, incorporating NSGA-II as an intelligent optimization engine. The framework constructs a multi-level traceability matrix linking requirements, functions, behaviors, and structural elements, and leverages NSGA-II to dynamically optimize the sequencing of the Design Structure Matrix, thereby enhancing the explicitness and visualization of coupling relationships. Rather than directly eliminating dependencies, the approach aims to support a more systematic modularity-oriented analysis.
View Article and Find Full Text PDFbioRxiv
August 2025
Jiaao Lu, Muneeb Zia, Danish A. Baig, Young Jin Lee, Euichul Chung, Geyu Yan, Philip Anschutz, Shane Oh and Muhannad S. Bakir are with the Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Objective: Optogenetics is a valuable and widely-used technique that allows precise perturbations of selected groups of cells with high temporal and spatial resolution by using optical systems and genetic engineering technologies. This study aims to develop Opto-Myomatrix, a novel optogenetic tool for precise muscle fiber control and high-resolution electrophysiological recording.
Method: Based on a flexible and biocompatible polymer substrate, the device incorporates an integrated μLED that delivers light at 465 nm for optogenetic stimulation and 32 PEDOT:PSS-coated electrodes for electromyography (EMG) recording.
Metalenses are ultrathin optical components enabling precise wavefront control via the use of engineered nanostructures and are traditionally fabricated as standalone elements. Herein, we demonstrated their integration with other optical components, particularly a distributed Bragg reflector mirror structure. Using nanoimprint lithography (NIL), we fabricated a metalens with a numerical aperture of 0.
View Article and Find Full Text PDFChem Asian J
August 2025
MOE Key Laboratory of Cluster Science, Key Laboratory of Medical Molecule Science and Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Address 1: 5 South Zhongguancun Street, Haidian, Beijing, 100081, China.
Biogenic guanine crystals widely distributed in organisms form ordered multi-level micro- and nano- structures and function as optical materials including reflectors, imaging mirrors, and photonic crystals for manipulating light. It is difficult to design green camouflage materials based on chlorophylls due to its poor photo and thermal stability under natural environment. Herein, a functional green camouflage biomimetic material based on chlorophyll derivative chlorophylls-Cu occluded into the crystal lattices of single crystalline anhydrous guanine microplates was designed, which exhibit high reflectivity and strong depolarization feature in the visible and near infrared range.
View Article and Find Full Text PDFNat Mater
August 2025
Department of Chemical Engineering, Columbia University, New York, NY, USA.
The ability to fabricate materials and devices at small scales by design has resulted in tremendous technological progress. However, the need for engineered three-dimensional (3D) nanoscale materials requires new strategies for organizing nanocomponents. Here we demonstrate an inverse design approach for the assembly of nanoparticles into hierarchically ordered 3D organizations using DNA voxels with directional, addressable bonds.
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