International Journal of Antennas and Propagation最新文献_第5页

Research on Electromagnetic Scattering Influence of Transmission Towers on Medium Wave Antenna Based on the Characteristic Mode Theory 基于特性模式理论的输电塔对中波天线的电磁散射影响研究

IF 1.5 4区计算机科学

International Journal of Antennas and Propagation Pub Date : 2023-12-26 DOI: 10.1155/2023/4788443

Shiqi Zong, Chaoqun Jiao, Jiangong Zhang, Zhibin Zhao, Zheyuan Gan

{"title":"Research on Electromagnetic Scattering Influence of Transmission Towers on Medium Wave Antenna Based on the Characteristic Mode Theory","authors":"Shiqi Zong, Chaoqun Jiao, Jiangong Zhang, Zhibin Zhao, Zheyuan Gan","doi":"10.1155/2023/4788443","DOIUrl":"https://doi.org/10.1155/2023/4788443","url":null,"abstract":"Electromagnetic scattering from UHV transmission towers is a major factor affecting the safety and stability of the surrounding antenna signal system. In this paper, the electromagnetic scattering effect of ±800 kV UHV DC transmission tower on the medium-wave antenna is investigated based on the characteristic mode theory (CMT). The simulation model of the tower and antenna is established, and the mode selection is carried out according to the percentage of the contribution of the characteristic mode to the total electromagnetic scattering. The effects of electromagnetic scattering under three conditions, namely, the number of towers, the distance between towers and antennas, and different frequencies, are investigated separately. The simulation results show that as the number of towers increases from 1 to 3, it leads to an increase in the electromagnetic scattering impact by about 49.5%. The shape distortion of the antenna’s directional map becomes more pronounced and is accompanied by the extension with the direction of the power line. The distance between the tower and the antenna is shortened from 500 m to 125 m, resulting in the growth of the influence of electromagnetic scattering by about 36.4%, and the directional gain of the antenna increases along the direction of the transmission line. As the frequency increases from 600 kHz to 1400 kHz, it leads to the rise of electromagnetic scattering effect of about 32.7% and the antenna directional map becomes more complicated. The research results will provide technical support for developing protective measures against electromagnetic scattering from UHV DC transmission towers to medium-wave antennas.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139052946","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

Liquid Crystal Polymer-Based Flexible Trap Ultra-Wideband Antenna Design 基于液晶聚合物的柔性陷波器超宽带天线设计

IF 1.5 4区计算机科学

International Journal of Antennas and Propagation Pub Date : 2023-12-26 DOI: 10.1155/2023/8872629

Xinwei Wang, Zhaoyang Xue, Qing Liang, Wei Xiong, Zhiyao Zhang

引用次数: 0

Identification of Control Parameters Using Taguchi Method for Hybrid Real-Binary Differential Evolution Algorithm and Its Applications in Electromagnetic Optimization 使用田口方法确定混合实数-二进制差分进化算法的控制参数及其在电磁优化中的应用

IF 1.5 4区计算机科学

International Journal of Antennas and Propagation Pub Date : 2023-12-22 DOI: 10.1155/2023/5171453

Wenchao Du, Jianhui Wang, Ruidong Wang, Xingning Jia, Guoche Qin, Chunshu Li

{"title":"Identification of Control Parameters Using Taguchi Method for Hybrid Real-Binary Differential Evolution Algorithm and Its Applications in Electromagnetic Optimization","authors":"Wenchao Du, Jianhui Wang, Ruidong Wang, Xingning Jia, Guoche Qin, Chunshu Li","doi":"10.1155/2023/5171453","DOIUrl":"https://doi.org/10.1155/2023/5171453","url":null,"abstract":"The hybrid real-binary differential evolution (HDE) algorithm has been proficient in addressing electromagnetic optimization problems (EOPs) involving both real and binary variables. However, its optimization performance on different control parameter (CP) settings is not further studied, and the method to determine the values of CPs is more likely to use the trial-and-error method, which lacks universality on both unimodal and multimodal benchmarks. To completely account for the effect of CPs in HDE, the Taguchi method is utilized to identify the values of each CP. The orthogonal experiment result is the average rank of the mean values of 23 benchmark functions obtained by HDE and other classic optimization algorithms. Based on the analysis of variance results, three CPs that have a major effect on the performance of HDE are selected, and each of them is changed from level 1 to level 5 to further obtain the best combination of CPs, which is indicated as HDEN1. To further enhance the local search ability of HDEN1 for the global best, a modified algorithm (HDEN2) is proposed based on a novel mutation strategy selection method, and the simulation results demonstrate that the minimum values obtained by HDEN2 are smaller than those obtained by HDEN1. Two EOPs, including planar microwave absorber and Yagi-Uda antenna designs, are solved to validate the performance of HDEN1 and HDEN2. The results reveal that the HDEN1 and HDEN2 outperform HDE, demonstrating the efficacy of the proposed method for identifying the CPs of HDE. In the end, a low profile and wideband RCS reduction pixelated checkboard metasurface is optimized utilizing the HDEN2, proving that the proposed algorithm can be a good candidate for hybrid real-binary electromagnetic problems.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945533","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

Retracted: Channel Estimation for Switch-Based Millimeter-Wave Communications via Atomic Norm 撤回：通过原子规范为基于交换机的毫米波通信进行信道估计

IF 1.5 4区计算机科学

International Journal of Antennas and Propagation Pub Date : 2023-12-20 DOI: 10.1155/2023/9838045