Applied Computational Electromagnetics Society Journal最新文献_第9页

Signal Propagation Modeling Based on Weighting Coefficients Method in Underground Tunnels 基于加权系数法的地下隧道信号传播建模

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360815

Yusuf Karaca, �zg�r Tamer

引用次数: 0

Light Wave Propagation Model for Indoor Visible Light Communication Systems Employing Small LED Sources 采用小型LED光源的室内可见光通信系统的光波传播模型

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360814

Marwa M. A. Elsaaty, A. Zaghloul, K. Hussein

{"title":"Light Wave Propagation Model for Indoor Visible Light Communication Systems Employing Small LED Sources","authors":"Marwa M. A. Elsaaty, A. Zaghloul, K. Hussein","doi":"10.47037/2021.aces.j.360814","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360814","url":null,"abstract":"─ The aim of the present work is to build a robust and computationally efficient model for the light wave propagation in indoor visible light communication (VLC) systems. It is assumed that a small (point) LED source is used inside a room of relatively small dimensions (room area ≤ 5m × 5m). The light wave is treated as an electromagnetic wave suffering multiple reflections on the walls of the room. The Geometrical Theory of Diffraction (GTD) is applied for evaluation of the light wave reflection on the rough walls of the room. Also, the present work is concerned with developing a new computational method for the assessment of intersymbol interference (ISI) encountered in such indoor VLC systems. The signal strength, the power of ISI, and hence, the signal-to-ISI ratio (SISIR) are evaluated over the horizontal plane of the mobile units (at a height of about 1m above the room floor). The effects of the room dimensions and some structural parameters such as the reflectance of the side walls on the SISIR are numerically investigated. Index Terms ─ Inter-Symbol Interference (ISI), Visible Light Communications (VLC).","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"2 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84616469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Train-mounted Broadband Monopole Antenna for 5G Communication 用于5G通信的车载宽带单极天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360709

H. Li, Lu Xu, Feng Qian, Y. Zhou

引用次数: 1

A Highly Efficient Dual-Band Transmitarray Antenna Using Cross and Square Rings Elements 一种采用十字环和方环元件的高效双频发射阵列天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360705

Yongliang Zhang, Xiuzhu Lv, Jiaxuan Han, Shuai Bao, Y. Cai, Zhao Wu

{"title":"A Highly Efficient Dual-Band Transmitarray Antenna Using Cross and Square Rings Elements","authors":"Yongliang Zhang, Xiuzhu Lv, Jiaxuan Han, Shuai Bao, Y. Cai, Zhao Wu","doi":"10.47037/2021.aces.j.360705","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360705","url":null,"abstract":"In this paper, a highly efficient dual-band transmitarray antenna using cross and square rings elements is presented for X and Ku bands. The dual-band transmitarray is designed for downlink/uplink frequencies of Ku band satellite communications. The transmitarray element consists of four metal patches and two dielectric substrates. The metal patch is printed on both sides of the substrate. By optimizing the parameters, the transmitarray element can achieve a transmission phase coverage greater than 360° and work independently in both frequency bands. Then, a method to select the size of the element is proposed, so that all the elements in the array can realize the transmission phase of the two frequencies as much as possible. A 201-elements transmitarray antenna is fabricated and measured and the band ratio of the antenna is 1.13. The measured maximum gain at 11.5 GHz is 22.4 dB, corresponding to the aperture efficiency is 52.7%. The measured maximum gain at 13 GHz is 24.2 dB, corresponding to the aperture efficiency is 62.4%. The 1-dB gain bandwidths are 9.7% (10.8-11.9 GHz) at X band and 9% (12.6-13.8 GHz) at Ku band.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"4 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81465141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sub-6 GHz Quad-Band Reconfigurable Antenna for 5G Cognitive Radio Applications 5G认知无线电应用的sub - 6ghz四频段可重构天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360810

Sivakumar Ellusamy, Ramachandran Balasubramanian

{"title":"Sub-6 GHz Quad-Band Reconfigurable Antenna for 5G Cognitive Radio Applications","authors":"Sivakumar Ellusamy, Ramachandran Balasubramanian","doi":"10.47037/2021.aces.j.360810","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360810","url":null,"abstract":"─ This article describes a quad-band frequency tunable antenna for 5G applications that operates in the sub-6 GHz frequency range. On the top side, a stubloaded square patch is printed on an inexpensive glass epoxy substrate, and on the opposite side, a C-shaped slot embedded into the partial ground plane. To achieve frequency reconfigurability with a consistent radiation pattern, the C-shaped slot and matching stub are used. The antenna is electronically frequency tunable by placing two positive intrinsic negative diodes (PIN) in the C-shaped slot and one PIN diode between the stub and feed line. The frequency is tunable between one ultra-wideband (UWB) and three communication bands based on the switching conditions of the PIN diodes. The proposed configuration is small, with a substrate dimension of 25×25×1 mm. The antenna was fabricated, tested and found measurements result back up the simulation; it can switch between UWB (3.31.0-6.03 GHz) and three communication modes (3.31-4.32, 3.784.98, 4.98-5.96 GHz). The antenna has peak gains of 1.91, 1.86, 2.0 and 2.0 dB, and radiation efficiencies of 80, 78, 83 and 86%, respectively, in the four frequency bands. The developed antenna is ideally suited for multi-functional wireless systems and cognitive radio applications since it covers the frequency bands below 6 GHz and is tunable between wide and narrow bands. Index Terms ─ Narrow band, PIN diode, quad-band, reconfigurable, square patch, stub, tunable, ultra wide band.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"47 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81777692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fast Analysis of Broadband Electromagnetic Scattering Characteristics of Electrically Large Targets using Precorrected Fast Fourier Transform Algorithm based on Near Field Matrix Interpolation Method 基于近场矩阵插值法的预校正快速傅立叶变换快速分析电大型目标宽带电磁散射特性

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360716

W. Kong, X. Yang, Feng Zhou, Jia-Ye Xie, C. Chen, Na Li, Wen Wen Yang

引用次数: 0

High-Q Active Microwave Sensor Based on Microstrip Complementary Split-Ring Resonator (MCSRR) Structure for Dielectric Characterization 基于微带互补分环谐振器(MCSRR)结构的介电特性高q有源微波传感器

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360715

Hong-Yi Gan, Wen‐Sheng Zhao, Dawei Wang, Jing Wang, Qi Liu, Gaofeng Wang

引用次数: 4

Electromagnetic Acoustic Transducer for Detection and Characterization of Hidden Cracks inside Stainless Steel Material 不锈钢材料内隐裂纹的电磁声换能器检测与表征

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360818

H. Boughedda, T. Hacib, Y. Bihan, M. Chelabi, H. Acikgoz

{"title":"Electromagnetic Acoustic Transducer for Detection and Characterization of Hidden Cracks inside Stainless Steel Material","authors":"H. Boughedda, T. Hacib, Y. Bihan, M. Chelabi, H. Acikgoz","doi":"10.47037/2021.aces.j.360818","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360818","url":null,"abstract":"─ Industrial structure are exposed to microstructural changes caused by fatigue cracking, corrosion and thermal aging. Generally, a hidden crack is very dangerous because it is difficult to detect by NonDestructive Evaluation (NDE) techniques. This paper presents a new approach to estimate the hidden cracks dimensions inside a stainless steel plate based on the EMAT signal. The received signal by EMAT is simulated using the Finite Element Method (FEM). Then, the identification of the hidden crack sizes is performed via the combination of two techniques; the first one is the Time-of-Flight (ToF) technique which was applied to estimate the crack height by the evaluation of the difference between the ToF of the healthy form and the defective form. Then, the crack width is estimated by the solution of the inverse problem from the received signal based on a meta-heuristic algorithm called Teaching learning Based optimization (TLBO). The obtained results illustrate the sensitivity of the EMAT sensor to the variation of the crack sizes. Moreover, the quantitative evaluation of the cracks dimensions, show clearly the efficiency and reliability of the adopted approache. Index Terms ─ Characterization of hidden cracks, FEM, NDE, Time-of-Flight, TLBO algorithm.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"23 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79257840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband Multimode Antenna for Sub-6 GHz Base Station Applications Sub-6 GHz基站宽带多模天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360920

Weifeng Lin, K. Rong, Qiming He, Zhe-Sheng Chen, Bei Huang, Jun Zhang

引用次数: 0

Design of Cylindrical Conformal Array Antenna based on Microstrip Patch Unit 基于微带贴片单元的圆柱共形阵列天线设计

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360809

Tianming Bai, Di Jiang, Shan Luo, K. Zhu

引用次数: 2