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检索条件"机构=National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics"

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A Radiation Pattern-Reconfigurable Patch Antenna with Tunable CSRR based on Liquid Metal and 3-D Printed Microfluidics

A Radiation Pattern-Reconfigurable Patch Antenna with Tunabl...

引用

2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Wang, Yumeng Gao, Lu Zheng, Pei Song, Lingnan School of Electronic and Information Engineering Beihang University Beijing China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781665452366

In this article, a radiation patternreconfigurable patch antenna with tunable complementary split-ring resonators (CSRR) based on liquid metal (LM) and 3-D printed microfluidics is presented. The antenna is composed of three layers, a top coaxial fed rectangular patch, a middle ground plane with two CSRRs etched symmetrically, and two bottom microfluidics channels each adhered underneath the corresponding CSRR. Pattern reconfiguration is achieved by filling the microfluidic channels with the liquid metal plugs to change the physical parameters of the CSRR structure. By adjusting the length of the slot stubs in CSRRs, the main beam of the double CSRR-loaded antenna can be continuously scanned from -46° to 46° in elevation plane. © 2022 IEEE.

关键词： Slot antennas

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Design of Non-uniform Flexible Meta-surface for Antenna Beam-steering 3

Design of Non-uniform Flexible Meta-surface for Antenna Beam...

引用

3rd IEEE International Conference on Electronic Information and Communication technology, ICEICT 2020

作者： Qiu, Yuwei Jiang, Zhiye Zheng, Pei School of Electronic Information Northwestern Polytechnical University Xi'an China National Key Laboratory of Science and Technology on Test Physics Numerical Mathematics Beijing China

ISBN: (纸本)9781728190457

Design of non-uniform flexible meta-surface for antenna beam-steering is presented in this paper. By properly tuning the dimensions of quasi-I-shaped unit cells on meta-surface, we propose a bi-layer meta-surface that can achieve beam deflection of up to 34°. Horn antenna is adopted as the feed antenna to illuminate the meta-surface which is printed on flexible plastic sheet. The meta-surface is fixed on the outside surface of horn antenna with an electric motor, making it possible to slide relative to the aperture of feed antenna. The horn antenna together with the meta-surface will work like a projector when operating, the main-beam of the horn antenna can be steered when different frames of the meta-surface cover the horn aperture and the steering range is ±34°•Radiation reconfigurable is thus achieved through a simple structure. Prototype will be fabricated in the following research. © 2020 IEEE.

关键词： Horn antennas

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Ballistic Target Micro-motion Parameters Identification with CNN Denoiser Based on Deep Learning

Ballistic Target Micro-motion Parameters Identification with...

引用

2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Lai, Ruixin Ai, Xia Wang, Shaoran Li, Mengmeng Liu, Jiaqi Ding, Dazhi Nanjing University of Science and Technology School of Electronics and Optical Engineering Nanjing China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

ISBN: (纸本)9781665452366

This paper proposes a method to identify micromotion parameters of radar echo with noise based on deep learning. The radar echo database is constructed from the point scattering model and the micro-Doppler spectrogram dataset is obtained then. The convolutional neural network is constructed to denoise radar echo with three kind of noises with different SNR, and target micro-motion parameters are identified. © 2022 IEEE.

关键词： Deep learning

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Full-Space Beam Scanning Antenna Based on Spoof Surface Plasmon Polaritons

Full-Space Beam Scanning Antenna Based on Spoof Surface Plas...

引用

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

作者： Wu, Zhicheng Kong, Xianglin Wang, Jun Xu, Ruofeng Zhao, Lei Xu, Yinfang School of Information and Control Engineering China University of Mining and Technology Xuzhou China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781733509657

In this paper, a full-space beam scanning antenna based on spoof surface plasmon polaritons (SSPPs) is proposed. The proposed antenna is composed of a SSPPs loaded by the varactor diodes and periodic metallic patches. The periodic patches can transform the slow waves from SSPPs into fast waves, and the cutoff frequency can be reconfigured by changing the capacitance of the varactor diode, which will make the radiation angle of the beam change within a fixed frequency. Simulation results show that the radiation angle ranges from -90° to 90° at 9 GHz. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Scanning antennas

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Application of improved genetic ant colony optimization in radar resource interference allocation 5

Application of improved genetic ant colony optimization in r...

引用

IET International Radar Conference 2020, IET IRC 2020

作者： Liao, Yanping Guo, Wenyuan Hu, Li Guo, Wenyuan Information and Communication Engineering Department Harbin Engineering University Harbin China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781839535635

Under the condition of limited interference resources, how to maximize the benefits of multiple jammers interfering with multiple radars has become a research hotspot. This paper has designed a reasonable interference evaluation method. Aiming at the disadvantages of genetic algorithm and ant colony optimization, made some improvements, and combined genetic methods and ant colony optimization, besides, a new crossover and mutation method based on constraints is proposed, which overcomes the shortcomings of invalid iteration of genetic algorithm and easy to fall into local optimal solution of ant colony optimization. Through simulation analysis, the fused algorithm can reach the optimal value within a short number of iterations, improving the utilization efficiency of the jammer. © 2020 Institution of Engineering and technology. All rights reserved.

关键词： Ant colony optimization

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Spiral Antenna Loaded with Directors for GPR Application 13

Spiral Antenna Loaded with Directors for GPR Application

引用

13th International Conference on Microwave and Millimeter Wave technology, ICMMT 2021

作者： Jiang, Zhiye Liu, Yaokun Liu, Shufang Shi, Xiaowei National Key Laboratory Of Science And Technology On Test Physics And Numerical Mathematics Beijing100076 China School Of Electronic Engineering Xidian University Xi'an710071 China

ISBN: (纸本)9781665434379

The antenna is one of the most critical components in the ground penetrating radar system. The spiral Antenna has the characteristics of ultra-wideband, circular polarization and small size, making it suitable for underground target detection. In this paper, a high-gain helical antenna is designed. Its |S11| is less than -10dB from 380MHz to 4GHz and the bandwidth is greater than 10:1, while a unidirectional radiation is achieved by embedding the antenna into a cylindrical cavity. At the same time, directors are loaded in the maximum radiation direction of the antenna to increase the gain of the antenna. The peak gain is 11.5dBi. The size of the antenna is 240mm×240mm×97mm. © 2021 IEEE.

关键词： Helical antennas

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Mechanically Beam-steering of Horn Antenna Using Non-uniform Flexible Meta-Surface 6

Mechanically Beam-steering of Horn Antenna Using Non-uniform...

引用

6th IEEE International Conference on Computer and Communications, ICCC 2020

作者： Jiang, Zhiye Zheng, Pei Qiu, Yuwei Zhu, Hailiang Ding, Chenyu Wei, Gao National Key Laboratory of Science and Technology on Test Physics Numerical Mathematics Beijing China School of Electronics and Information Northwestern Polytechnical University Xi'an Shaanxi China

ISBN: (纸本)9781728186351

Research on mechanically beam-steering of horn antenna using non-uniform meta-surface is presented in this paper. After optimizing the layout of quasi-I-shaped unit cell, we designed a flexible bi-layer meta-surface that can bring a main beam deflection of 40°. When the meta-surface is sliding along the long side of horn antenna, the main beam can be steered accordingly in a range of ±40°. A mechanically radiation reconfigurable antenna is thus achieved by a simple structure. Sliding of the meta-surface relative to the horn can be realized by a motor-driven conveyor belt when the prototype is fabricated in the following research. © 2020 IEEE.

关键词： Horn antennas

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In-material measurement technique for brittle materials subjected to shock loading

In-material measurement technique for brittle materials subj...

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2011 International Conference on Electronic and Mechanical Engineering and Information technology, EMEIT 2011

作者： Xu, Songlin Liu, Yonggui Zheng, Hang Wang, Daorong CAS Key Laboratory for Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei Anhui 230026 China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing 100076 China

ISBN: (纸本)9781612840857

Two kinds of magnetic gauges, including electromagnetic particle velocity (EMV) gauge and a combined gauge composed of EMV gauge and electromagnetic (EM) stress gauge, are introduced to investigate the dynamic damage of brittle materials subjected to shock loading. The former is now used for the measurements of non-magnetic materials under pressure-shear impact loading. The latter one can be used in normal plate impact, and the experimental results with this gauge could be self-proofed. The preliminarily experimental results show that these techniques are satisfactory. © 2011 IEEE.

关键词： Gages

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Source-Configured Microwave Plasmonic Vortices Based on Single Meta-Particle

Source-Configured Microwave Plasmonic Vortices Based on Sing...

引用

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

作者： Kong, Xianglin Zhao, Lei Shen, Xiaopeng Xu, Yinfang School of Information and Control Engineering China School of Materials Science and Physics China University Mining and Technology Xuzhou China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China

ISBN: (纸本)9781733509657

In this paper, generation of plasmonic vortices with tunable topologic charges is proposed in the microwave regime. Tunable vortices with topologic charges of 0, +1 and -1 can be configured by illuminating incident plane waves with linearly polarization (LP), left-circularly polarization (LHCP) and right-circularly polarization (RHCP) on a single meta-particle, respectively. A spiral meta-particle operating at 2.94 GHz is designed, fabricated and measured to demonstrate the source-configured characteristics. The results showed that simulation and test are consistent with the theoretical ones. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Vortex flow

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Unified OSTBC-based communication scheme for cooperative space vehicles

Unified OSTBC-based communication scheme for cooperative spa...

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IET International Radar Conference 2018, IRC 2018

作者： Geng, Jian Liu, Hongyan Jin, Wen Yan, Xinfeng Xu, Jin Beijing Institute of Space Long March Vehicle Beijing China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics China

In many spatial cooperative vehicle networks, omni-directional communication is preferred due to its flexibility for networking. In the recent studies, space time code was shown to be an effective approach for improving the performance of the omni-directional communication between space vehicles. This paper studies the unified scheme for the orthogonal space time block code-based transmission between two space vehicles equipped with different numbers of antennas. It is obtained that at most six passive antennas and four RF chains are enough for the typical use. In the proposed scheme, the receiver can perform a unified detection procedure regardless of the actual number of the transmit antennas, which facilitates the practical application. Simulation results validate the proposed scheme in terms of the cumulative distribution function of the received signal-to-noise ratios. © 2019 Institution of Engineering and technology. All rights reserved.

关键词： Space time codes

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