Applied Computational Electromagnetics Society Journal最新文献_第10页

Optimizing Processing Time of Radio-Astronomy Antenna Simulations Using FEKO 利用FEKO优化射电天文天线仿真处理时间

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2020-12-08 DOI: 10.47037/2020.ACES.J.351007

Rowanne Steiner, D. Ung, A. Hubrechsen, Robert D. Jones, R. Wayth, M. Bentum, A. B. Smolders

{"title":"Optimizing Processing Time of Radio-Astronomy Antenna Simulations Using FEKO","authors":"Rowanne Steiner, D. Ung, A. Hubrechsen, Robert D. Jones, R. Wayth, M. Bentum, A. B. Smolders","doi":"10.47037/2020.ACES.J.351007","DOIUrl":"https://doi.org/10.47037/2020.ACES.J.351007","url":null,"abstract":"─ The far-field pattern of a geometrically large and complex antenna used in low-frequency radio astronomy is computationally expensive to simulate on electromagnetic simulators, such as FEKO. For example, one station of the Square Kilometer Array, which consists of 256 log-periodic antenna elements, will take years to simulate using the full CAD model for the full operational frequency band. This paper focuses on reducing the simulation time for a single antenna element by simplifying the simulation model, thus decreasing the number of unknowns that have to be solved in a simulation. An iterative process for optimizing the simplification of such an element is described, while keeping the reflection coefficient within 1 dB absolute mean deviation of the measured data. After four iterations, the amount of unknowns to be solved, which includes the number of triangles and segments, was reduced from 29,307 to 11,991. This decreased the computation time by 86.5%, making array simulations feasible. Using the techniques described in the paper, other antenna constructions can benefit from it and be simulated more efficiently. Index Terms ─ Antenna, FEKO, optimization techniques, radio astronomy, square-kilometer array","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"35 1","pages":"1153-1160"},"PeriodicalIF":0.7,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41845539","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

Interpretation Method of GATEM Data Based on PID Controller Iteration Downward Continuation Method 基于PID控制器迭代向下延拓法的GATEM数据解释方法

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2020-10-16 DOI: 10.21203/rs.3.rs-92027/v1

Shan-shan Guan, Yu Zhu, Bingxuan Du, Dong-sheng Li, Yuan Wang, Qiong Wu, Yanju Ji

{"title":"Interpretation Method of GATEM Data Based on PID Controller Iteration Downward Continuation Method ","authors":"Shan-shan Guan, Yu Zhu, Bingxuan Du, Dong-sheng Li, Yuan Wang, Qiong Wu, Yanju Ji","doi":"10.21203/rs.3.rs-92027/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-92027/v1","url":null,"abstract":"\u0000 The Ground-source Airborne Time-domain Electromagnetic (GATEM) system has advantages for high efficiency and complex areas such as mountainous zone. The widely used section interpretation method, ignoring the impact of flight height, which seriously affects the interpretation and imaging accuracy of shallow anomalies. The PID controller iteration downward continuation method is proposed. Based on the original continuation iteration method, the differential coefficient and integral coefficient are added. The result shows that the new method remarkably decreases the iteration number and the accuracy are verified by comparison with the numerical integration solution. The PID controller iteration downward continuation method is applied to the interpretation of GATEM data. For synthetic data, the after continuation interpretation results are closer to the true model than the z = 30 m interpretation results. The method is also applied to GATEM field data in Yangquan City, Shanxi Province, China. The interpretation performs using PID controller iteration downward continuation results in a reliable GATEM field.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"5 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84739495","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

A Compact Eight-port CPW-fed UWB MIMO Antenna with Band-notched Characteristic 一种具有带缺口特性的紧凑型八端口cpw馈电超宽带MIMO天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2020-10-07 DOI: 10.47037/2020.aces.j.350806

Li-Yan Chen, Weisi Zhou, Jingsong Hong, M. Amin

引用次数: 2

Provably stable local application of Crank-Nicolson time integration to the FDTD method with nonuniform gridding and subgridding Crank-Nicolson时间积分在具有非均匀网格和子网格的FDTD方法中的可证明的稳定局部应用

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2018-03-01 DOI: 10.23919/ROPACES.2018.8364206

A. V. Londersele, D. Zutter, D. Ginste

引用次数: 1

Earth Conductivity Estimation from Through-the-Earth Measurements of 94 Coal Mines Using Different Electromagnetic Models. 利用不同电磁模型估算94个煤矿地通测量的土壤电导率。

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2014-10-01

Lincan Yan, Joseph Waynert, Carl Sunderman

{"title":"Earth Conductivity Estimation from Through-the-Earth Measurements of 94 Coal Mines Using Different Electromagnetic Models.","authors":"Lincan Yan, Joseph Waynert, Carl Sunderman","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Through-the-Earth (TTE) communication systems require minimal infrastructure to operate. Hence, they are assumed to be more survivable and more conventional than other underground mine communications systems. This survivability is a major advantage for TTE systems. In 2006, Congress passed the Mine Improvement and New Emergency Response Act (MINER Act), which requires all underground coal mines to install wireless communications systems. The intent behind this mandate is for trapped miners to be able to communicate with surface personnel after a major accident-hence, the interest in TTE communications. To determine the likelihood of establishing a TTE communication link, it would be ideal to be able to predict the apparent conductivity of the overburden above underground mines. In this paper, all 94 mine TTE measurement data collected by Bureau of Mines in the 1970s and early 1980s, are analyzed for the first time to determine the apparent conductivity of the overburden based on three different models: a homogenous half-space model, a thin sheet model, and an attenuation factor or Q-factor model. A statistical formula is proposed to estimate the apparent earth conductivity for a specific mine based on the TTE modeling results given the mine depth and signal frequency.</p>","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"29 10","pages":"755-762"},"PeriodicalIF":0.7,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4512942/pdf/nihms703218.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34040453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized spectral decomposition approach to a stochastic finite integration technique electrokinetic formulation 随机有限积分技术的广义谱分解求解电动公式

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2014-06-16 DOI: 10.1049/CP.2014.0171

L. Codecasa, L. Rienzo

引用次数: 3

Multiband Triple L-Arms Patch Antenna with Diamond Slot Ground for 5G Applications 钻石槽接地的5G多频段三l臂贴片天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2020.aces.j.360310

引用次数: 4