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Squid-inspired and wirelessly controllable display for active camouflage in aquatic-environment

npj Flexible electronics 2024年第1期8卷 900-909页

作者： Doyoung Kim Seung Won Seon Minkyung Shin Jihwan Kim Bogeun Kim Janghoon Joo Sang Uk Park Wooseok Kim Hee Kyu Lee Byeong Woon Lee Se Gi Lee Su Eon Lee Ji-Hun Seo Seung Ho Han Bong Hoon Kim Sang Min Won Department of Electrical and Computer Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon 16419Republic of Korea Department of Smart Wearable Engineering Soongsil UniversitySeoul 06978Republic of Korea Electronic Convergence Materials and Devices Research Center Korea Electronics Technology Institute(KETI)Seongnam 13509Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Robotics and Mechatronics Engineering DGISTDaegu 42988Republic of Korea

Achieving optimal camouflage in an aquatic environment necessitates the ability to modulate transmittance in response to the surrounding obscurity and potential *** adaptation involves a dynamic transition from transparency to a deep-blue color,especially in low-light or dark *** a strategy promotes a seamless assimilation with the surroundings,enabling the absorption of searchlights and,subsequently,diminishing the risk of detection by ***,the presence of sophisticated mechanisms that facilitates stable and efficient control of transmittance is imperative,enabling smooth transition between transparent and deep-blue hues within the aquatic *** study presents nature-inspired programmable camouflage system that integrates an electrochromic display as the primary transmittance change element and a wireless base module for power and data *** technology offers a robust and flexible construction,ensuring stable operation as demonstrated through mechanical-fatigue experiments and quantitative simulation.A custom circuit and a power-control software package enable active control of multiple electrochromic displays while submerged in water.

关键词： transparency submerged lights

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Guest Editorial Special Issue on Neuromorphic Devices and Circuits for Next-Generation Flexible electronics in IEEE Journal on Flexible electronics

IEEE Journal on Flexible Electronics

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IEEE Journal on Flexible electronics 2024年第1期3卷 2-3页

作者： Liu, Fengyuan Goswami, Sreetosh Pan, Lijia Wang, Yanzhi Fondazione Bruno Kessler Microsystems Technology Unit Center for Sensors and Devices Trento38123 Italy Northeastern University Bendable Electronics and Sustainable Technologies Group Electrical and Computer Engineering Department BostonMA02120 United States Indian Institute of Science Centre for Nano Science and Engineering Bengaluru560012 India Nanjing University School of Electronic Engineering Nanjing210023 China Northeastern University Electrical and Computer Engineering Department BostonMA02120 United States

It is fascinating how our body receives an immense amount of sensory information through numerous receptors distributed throughout the body and efficiently integrates it to make decisions for daily activities, while maintaining extremely low energy consumption and cognitive load. This bioinspired sensory information processing paradigm offers unparalleled advantages over traditional von Neumann architectures due to its exceptional energy efficiency, fault tolerance, and adaptability. While previous efforts in this area have mainly focused on the development of biomimetic sensors, it is equally important to create a computing architecture that can process sensory data locally before transmitting it to a higher level. The strategy of offloading computation at the edge can significantly reduce data latency, saving transmission bandwidth and relieving the burden of computation at a higher level, just like the way our peripheral nervous system complements the central nervous system.

关键词： Special issues and sections Neuromorphic engineering Receptor (biochemistry) Flexible electronics

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A Low-Profile Circularly Polarized End-Fire Antenna Based on Substrate-Integrated Waveguide Horn

A Low-Profile Circularly Polarized End-Fire Antenna Based on...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Liu, Zhiheng Lin, Shu Li, Pingyu Wang, Yingqiao Zhang, Xingqi Zhang, Xinyue School of Electronics and Information Engineering Harbin Institute of Technology Harbin China Jilin University Department of Communication Engineering Changchun China University of Alberta Department of Electrical and Computer Engineering Edmonton Canada Maynooth University Department of Electronic Engineering Maynooth Ireland

ISBN: (纸本)9781733509657

This paper presents a novel circularly polarized end-fire antenna operating in the L-band, designed specifically for personal mobile communication terminals. The antenna utilizes a substrate-integrated waveguide (SIW) horn to achieve end-fire radiation. To achieve left-handed circular polarization (LHCP), slots are introduced on the metallic frame of the device. Through simulations, we demonstrate that the designed antenna can achieve LHCP end-fire radiation within the frequency range of 1560-1610 MHz, with an in-band reflection loss better than 6 dB and an axial ratio (AR) better than 3.6 dB. The circularly polarized end-fire antenna exhibits extremely low-profile characteristics and holds great potential for applications in personal mobile communication terminals. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Substrate integrated waveguides

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A Miniaturized Fan Beam Antenna Based on Spherical Luneburg Lens 11

A Miniaturized Fan Beam Antenna Based on Spherical Luneburg ...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： Liu, Zhiheng Lin, Shu Li, Pingyu Wang, Yingqiao Zhang, Xinyue Zhang, Xingqi Harbin Institute of Technology School of Electronics and Information Engineering Harbin China Jilin University Department of Communication Engineering Changchun China Maynooth University Department of Electronic Engineering Maynooth Ireland University of Alberta Department of Electrical and Computer Engineering Edmonton Canada

ISBN: (纸本)9798350326277

A beamforming antenna based on a spherical Luneburg lens operating at 3-4 GHz is proposed. The antenna consists of a spherical lens with a radius of 0.8 %0 (free-space wavelength of the central operating frequency) and five double-ridged waveguides. An approximation to an ideal Luneburg lens is realized by controlling the air-filling rate of a series of hollow dielectric cones with common vertices. By adopting the double ridge waveguide as the feed source, the requirement of the fan beam for the smaller aperture feed source is realized. The simulation results show that the aperture efficiency of the designed lens can reach 60 %, the synthetic beam is a fan beam with a width of 145°, and the gain flatness is better than 0.5 dB within ± 60°. The antenna has the advantages of small lens size, high aperture efficiency, and wide synthetic beam, and can be used for the deployment of 5G communication base stations. © 2023 IEEE.

关键词： 5G communication Aperture efficiency Double-ridged waveguides Fan beam Luneburg lens

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Experimental Investigation of 3D-Printed Lightweight Waveguide Port Antenna 11

Experimental Investigation of 3D-Printed Lightweight Wavegui...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： Wang, LiBo Lin, Shu Wang, Yingqiao Xu, Tong Zhang, Xinyue Zhang, Xingqi Harbin Institute of Technology School of Electronics and Information Engineering Harbin China Jilin University Department of Communication Engineering Changchun China Maynooth University Department of Electronic Engineering Maynooth Ireland University of Alberta Department of Electrical and Computer Engineering Edmonton Canada

ISBN: (纸本)9798350326277

In order to make the antenna lightweight, this paper proposed a rectangular aperture stepped waveguide model working in the S band based on the 3D printing technology of ABS (Acrylonitrile Butadiene Styrene) plastic dielectric materials. The antenna incorporates a copper foil coating to provide the necessary electrical properties of a metal surface. The waveguide is fed by an SFT-50-3 semi-steel cable, and tested using an Agilent E8363B vector network analyzer. Experimental results demonstrate that the waveguide exhibits a reflection coefficient below -10 dB within the frequency range of 3.44 GHz to 3.8 GHz. Furthermore, to enhance the antenna's gain, a prism lens with a trapezoidal axis cross-section printed in 3D using ABS plastic dielectric material is integrated at the waveguide's front end. This configuration results in an increased gain of 6.41 dBi at 3.6 GHz. Compared to an all-metal model, the proposed antenna achieves an 86.5% reduction in weight while maintaining performance, making it suitable for various outdoor elevated antenna applications. © 2023 IEEE.

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A Ku-Band Omnidirectional High-Gain Printed Antenna Based on Continuous Transverse Stub and Dipole Configuration

A Ku-Band Omnidirectional High-Gain Printed Antenna Based on...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Li, Pingyu Lin, Shu Liu, Zhiheng Wang, Yingqiao Zhang, Xinyue Zhang, Xingqi School of Electronics and Information Engineering Harbin Institute of Technology Harbin China Jilin University Department of Communication Engineering Changchun China Maynooth University Department of Electronic Engineering Maynooth Ireland University of Alberta Edmonton Department of Electrical and Computer Engineering Canada

ISBN: (纸本)9781733509657

The Ku band is one of the most commonly used bands in satellite mobile communication systems. This paper introduces an omnidirectional high-gain printed antenna designed specifically for the Ku band. It is an antenna array composed of a continuous transverse stub (CTS) structure and a dipole formed by a pair of triangular patches. The antenna uses a printed structure for miniaturization and low profile, and is fed by a coplanar waveguide (CPW) and a coaxial line. Simulation results show that the antenna's bandwidth, defined as $\vert S_{11}\vert © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Microstrip antennas

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Distributed Aperture Coherent Synthesis Method based on Two-stage Compensation 2

Distributed Aperture Coherent Synthesis Method based on Two-...

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2nd IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024

作者： Liu, Zhongwei Zhou, Dongming Xiang, Rongrong Chen, Jie Wu, Tianhang Ding, Tianyu Liu, Xiaochuan Gao, Hongwei Beihang University School of Electronic and Information Engineering Beijing China School of Information and Electronics Beijing Institute of Technology Radar Research Lab Beijing China Beijing Institute of Computer Technology and Application Department of Data Technology and Application Beijing China Beijing Institute of Radio Measurement Radar R&d Center Beijing China

ISBN: (纸本)9798331515669

To solve the problem that it is difficult to accurately estimate the coherent parameters of distributed aperture radar under the condition of low signal-to-noise ratio, a distributed coherent synthesis method based on two-stage compensation is proposed in this paper. This method utilizes prior information such as system layout, beam pointing, and inertial navigation station location to perform coarse alignment of echoes at the first stage in time, and then uses cross-correlation method to estimate coherent parameters of delay and phase within a small range, and perform precise compensation of time and phase at the second stage, so as to realize the coherent synthesis of multiple radar echoes. Experimental results show that the proposed method can effectively realize distributed coherent synthesis processing under low signal-to-noise ratio. © 2024 IEEE.

关键词： Signal to noise ratio

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UAV-Aided Localization and Communication: Joint Frame Structure, Beamwidth, and Power Allocation

IEEE Journal of Selected Areas in Sensors

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IEEE Journal of Selected Areas in Sensors 2024年 1卷 154-165页

作者： Liang, Tianhao Zhang, Tingting Zhou, Sheng Liu, Wentao Li, Dong Zhang, Qinyu School of Electronics and Information Engineering Shenzhen518055 China Guangdong Provincial Key Laboratory of Space-Aerial Networking and Intelligent Sensing 518055 China Pengcheng Laboratory Shenzhen150001 China Tsinghua University Department of Electronic Engineering Beijing100084 China Macau University of Science and Technology School of Computer Science and Engineering 999078 China

In wireless sensors networks, integrating localization and communication technique is crucial for efficient spectrum and hardware utilizations. In this article, we present a novel framework of the unmanned aerial vehicle (UAV)-aided localization and communication for ground node (GN), where the average spectral efficiency (SE) is used to reveal the intricate relationship among the frame structure, channel estimation error, and localization accuracy. In particular, we first derive the lower bounds for channel estimation error and the 3-D location prediction error, respectively. Leveraging these comprehensive analysis, we formulate a problem to maximize the average SE in the UAV-GN communication, where the frame structure, beamwidth, and power allocation can be jointly optimized. Subsequently, we propose an efficient iterative algorithm to address this nonconvex problem with closed-form expressions for beamwidth design and power allocation. Numerical results demonstrate that the performance of our proposed method can approach the upper bound with low complexity, and achieve over 70% performance gain compared with communication-only benchmarks. In addition, the analysis highlights the dominated impacts of the Doppler effect on the average SE. © 2024 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Wideband High-Gain Omnidirectional Antenna Based on Air-Balanced Microstrip Line 11

Wideband High-Gain Omnidirectional Antenna Based on Air-Bala...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： Xu, Tong Lin, Shu Wang, Yingqiao Wang, LiBo Zhang, Xinyue Zhang, Xingqi Harbin Institute of Technology School of Electronics and Information Engineering Harbin China Jilin University Department of Communication Engineering Changchun China Maynooth University Department of Electronic Engineering Maynooth Ireland University of Alberta Department of Electrical and Computer Engineering Edmonton Canada

ISBN: (纸本)9798350326277

In order to achieve a low-profile wideband high-gain omnidirectional antenna, this paper adopts an air-balanced microstrip line feeding structure to feed the 1×8 array of half-wavelength symmetrical dipoles. As a result, a high-gain omnidirectional antenna operating in the frequency range of 0.5GHz to 0.6GHz has been developed. The antenna achieves a gain of up to 9.8dBi at 0.59GHz and a maximum deviation of 3dB in the horizontal radiation pattern within the operational frequency range which exhibits excellent omni-directional radiation characteristics. The antenna is designed using CST Microwave Studio® software simulation, and its fabrication is relatively simple, making it suitable for wide application in UHF frequency range mobile communication systems. © 2023 IEEE.

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A VHF-Band Printed Reconfigurable Dipole Antenna Based on Bistable Materials

A VHF-Band Printed Reconfigurable Dipole Antenna Based on Bi...

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2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023

作者： Liang, Fanqin Lin, Shu Guo, Xiangwei Dai, Fuhong Denisov, Alexander Zhang, Xinyue Zhang, Xingqi SEIE Harbin Institute of Technology Harbin China School of Astronautics Harbin Institute of Technology Harbin China School of Electronics and Information Engineering Harbin Institute of Technology Harbin China Department of Electronic Engineering Maynooth University Dublin Ireland Department of Electrical and Computer Engineering University of Alberta Edmonton Canada

ISBN: (纸本)9798350341140

In this paper, a bistable material based on glass fiber reinforced resin matrix composites (GFRP) is used as the dielectric substrate of a printed dipole antenna to realize pattern reconfigurable characteristics. The proposed reconfigurable dipole antenna is symmetrical and can work at 100MHz. Its shape can be turned from straight into a circular conformal form. The antenna pattern can be reconfigured from the conventional "8" shape to an ellipse, forming approximate spherical shape radiation. Simulation results show that the antenna patterns can be reconfigured while remaining the resonance frequency unchanged, and the direction chart can be reconstructed. The proposed antenna can be applied to portable mobile communication terminals at the VHF frequency band. © 2023 IEEE.

关键词： Bistable material pattern reconstruction printed dipole antenna

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