Journal of Electromagnetic Waves and Applications最新文献

{"title":"Finding the polarizability of dielectric half-ellipse","authors":"Mehwish Nisar, Sidra Batool, Fabio Mangini, Henrik Wallén, Ari Sihvola, Fabrizio Frezza","doi":"10.1080/09205071.2023.2277189","DOIUrl":"https://doi.org/10.1080/09205071.2023.2277189","url":null,"abstract":"AbstractThis article studies the electrostatic response of a two-dimensional dielectric half-ellipse. A semianalytical method is presented for solving the polarizability of a half-ellipse as a function of its relative permittivity. The polarizability depends on the direction of incident field, and therefore, it is written as a dyadic with two perpendicular components. These are called series and parallel polarizability, and they are solved separately. The solution requires a series expansion of the potential function, and the coefficients must be obtained numerically, through an inversion of a finite matrix equation. Numerical results are presented for the polarizability components of the half-ellipse as functions of its geometry and permittivity.KEYWORDS: Laplace equationpolarizabilityelliptic coordinatesPEC AcknowledgementsWe would like to thank Dr. Henrik Kettunen for his expertise and valuable contribution to the theoretical analysis, especially during the initial studies.Disclosure statementThe authors declare that they have no known competing interests that could have appeared to influence the work reported in this paper.Additional informationFundingThe research is funded by Sapienza University of Rome, Italy.Notes on contributorsMehwish NisarMehwish Nisar conducted this research and drafted the manuscript, Ari Sihvola and HenrikWallén contributed to the theoretical and numerical analysis as well as in finalizing the manuscript. Sidra Batool, Fabio Mangini and Fabrizio Frezza proofread the article.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An optically transparent coplanar L-probe fed antenna based on capacitively coupled array of patches","authors":"Pingle Liang, Juan Chen","doi":"10.1080/09205071.2023.2277188","DOIUrl":"https://doi.org/10.1080/09205071.2023.2277188","url":null,"abstract":"AbstractAn optically transparent antenna fed by a coplanar L-probe is proposed in this paper. Indium-doped tin oxide (ITO) with a sheet resistance of 3.5 Ω/sq etched on a soda-lime glass substrate is used as radiation array and ground to achieve high optical transmittance. TM10 and TM20 modes are excited simultaneously to expand work bandwidth. The fabricated antenna achieves a –10 dB reflection bandwidth of 27.5% from 4.7 to 6.2 GHz with the overall size of 42 mm × 42 mm × 3.3 mm. Different from many antennas composed of ITO, the proposed antenna exhibits directional radiation patterns with the maximum realized gain of 4.6 dBi and the maximum efficiency of 61%. Meanwhile, the optical transmittance of the antenna can reach above 58%.Keywords: Optical transmittanceantennagainindium-doped tin oxide (ITO) Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Shaanxi Natural Science Basic Research Project of Shaanxi science and Technology Office[No. 2023-JC-QN-0673]the National Natural Science Foundations of China[No. 61971340 and 62122061].Notes on contributorsPingle LiangPingle Liang received the B.E. degree in electronic and information engineering from Chongqing University, Chongqing, China, in 2021. He is currently working toward the M.E. degree in Information and communication Engineering with the School of Information and communications Engineering, Xi'an Jiaotong University, Xi'an, China. His research interests include optically transparent antennas and ground penetrating radar antennas.Juan ChenJuan Chen was born in Chongqing, China. She received the Ph.D. degree from Xi'an Jiaotong University, Xi'an, China, in 2008, in electromagnetic field and microwave technology. She is currently working in Xi'an Jiaotong University, Xi'an, China, as a professor. Her research interests include the computational electromagnetics, microwave device design, etc.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"24 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135589929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling Pennes’, bioheat transfer equation in thermoelasticity with one relaxation time","authors":"Shreen El-Sapa, Alaa A. El-Bary, Wedad Albalawi, H. M. Atef","doi":"10.1080/09205071.2023.2272612","DOIUrl":"https://doi.org/10.1080/09205071.2023.2272612","url":null,"abstract":"","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"10 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136103125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniaturized wide-band dual-polarized tightly coupled array for 5G millimeter-wave smartphones","authors":"Chan Bai, Shuai Zhang, Zixuan Song, Yuguo Liu, Zepu Wang","doi":"10.1080/09205071.2023.2270562","DOIUrl":"https://doi.org/10.1080/09205071.2023.2270562","url":null,"abstract":"","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134910157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A wideband, thin profile and enhanced gain microstrip patch antenna modified by novel mushroom-like EBG and periodic defected ground structures","authors":"Cemile Tangel, Nigar Berna Teşneli","doi":"10.1080/09205071.2023.2270603","DOIUrl":"https://doi.org/10.1080/09205071.2023.2270603","url":null,"abstract":"AbstractThis paper presents a wideband, thin-profile and enhanced-gain microstrip patch antenna improved by using a novel mushroom-like Electromagnetic Band Gap (EBG) structure and forming periodic Defected Ground Structures (DGS) on the ground plane. The proposed antenna operates between 9.56 and 14 GHz and has 4.44 GHz–10 dB impedance bandwidth. With A4, the gain of the reference antenna is increased by 64.4%, while a 38% bandwidth is also achieved. The parametric analyses carried out on the metallic part area of the novel EBG patch indicated that when the area of the used EBG patches are approximately three quarters or less of the conventional ones, greater gain values for the designed antenna are obtained. This relation between the EBG patches and the antenna gain can be pointed out as the novelty of the study. The results were analysed by the simulations carried out with CST Microwave Studio and were verified by measurements from manufactured prototypes.KEYWORDS: Widebandthin-profilegain enhancementmicrostrip antennaEBGDGS Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsCemile TangelCemile Tangel received BSc degree from Gazi University, Dept. of Electrical and Electronics Eng. in 1991, and MSc degree from Kocaeli University Dept. of Electronics and Comimunication Eng. in 2009. She has currently been pursuing PhD degree in Electrical and Electronics Engineering, Graduate Education Institute, Sakarya University of Applied Sciences, Sakarya, Turkey. Her research areas include electromagnetic theory, antenna designs, microstrip antennas and EBG structures.Nigar Berna TeşneliNigar Berna Teşneli received the B.S., M.S., and Ph.D. degrees in Physics Engineering from the Faculty of Engineering, University of Hacettepe, Ankara, Turkey, in 1998, 2000, and 2005, respectively. She worked at the Department of Physics Engineering, University of Hacettepe, Ankara, Turkey and with the Department of Electrical and Electronics Engineering, University of Sakarya, Sakarya, Turkey. She has been with the Nanomaterial Engineering Group, University of Sheffield, Sheffield, U.K., as visiting researcher in 2003. Since 2018, she has been working as an Assistant Professor with the Department of Engineering Fundamental Sciences, Sakarya University of Applied Sciences, Sakarya, Turkey. Her research interests include electromagnetic field theory, antenna design, metamaterials, electromagnetic bandgap structures, frequency selective surfaces, electromagnetic measurements and electromagnetic compatibility.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"17 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135366816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel defected ground structure for high-isolation circularly polarized MIMO patch antenna","authors":"Duc-Nguyen Tran Viet, Hung Tran-Huy, Dinh Nguyen Quoc, Hyun Chang Park","doi":"10.1080/09205071.2023.2270524","DOIUrl":"https://doi.org/10.1080/09205071.2023.2270524","url":null,"abstract":"ABSTRACTThis paper introduces a method to reduce mutual coupling in a two-element multiple-input multiple-output (MIMO) antenna, which is a significant challenge due to the need for high isolation over a wide frequency range with close element spacing. Previous works typically achieved high isolation within a narrow bandwidth. The paper presents a novel defected ground structure (DGS) with a modified I-shaped slot, which effectively minimizes mutual coupling in a dual-sense MIMO circularly polarized (CP) antenna over a broader bandwidth than the previous approaches. The fabricated 2-element prototype with an overall size of 0.98λ × 0.71λ × 0.05λ and an edge-to-edge spacing of 0.08λ at the center operating frequency has a measured bandwidth of 2.5% (5.2–5.33 GHz). Across this band, the isolation is always better than 35 dB and the gain is higher than 4.8 dBi. The MIMO parameters are also investigated, which proves the good diversity performance of the proposed design.KEYWORDS: MIMOcircularly polarizedhigh isolationmicrostrip patchdefected ground structure Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135511188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An efficient determination of field distributions in E-plane dielectric loaded waveguides","authors":"Ahmet Aydoğan","doi":"10.1080/09205071.2023.2270477","DOIUrl":"https://doi.org/10.1080/09205071.2023.2270477","url":null,"abstract":"ABSTRACTThis paper proposes a new, fast, and efficient method for determining the electromagnetic field distribution in two-port E-plane dielectric-loaded uniform rectangular waveguides. The analysis region is divided into individual blocks in the absence and presence of dielectric obstacles. The non-zero electric and magnetic field components are constructed throughout the system via the proposed method by utilizing the generalized scattering matrix method between blocks for unimodal or multimodal excitation. The resulting field distributions are compared to those obtained from commercial software, with very close agreement achieved, but with a significantly reduced computational time for the proposed method. The method is applicable in a straightforward manner and has been tested on both a filter device with relatively complex geometry and a disjoint system with a modal coupling challenge between its elements. The field components' accuracy is also tested by calculating the Poynting vector along the system. Additionally, this approach provides the global scattering parameters at the physical ports as a co-product. The proposed method has the potential to be applied to various two-port networks by using the proposed method according to the considered problem.KEYWORDS: Cascaded systemsfield distributiongeneralized scattering matrixmicrowave devicesrectangular waveguide Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"23 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Failure diagnosis for time-modulated arrays based on compressed sensing","authors":"Guo Bai, Cheng Liao, You-Feng Cheng, Yuanzhi Liu, Ju Feng, Xuanming Zhong","doi":"10.1080/09205071.2023.2270517","DOIUrl":"https://doi.org/10.1080/09205071.2023.2270517","url":null,"abstract":"AbstractTime-modulated arrays (TMAs) have a high design degrees of freedom (DoFs) to improve radiation performance, while they are prone to failure due to their hardware characteristics. In this article, we propose a novel technique to diagnose impaired TMAs based on compressed sensing (CS). The TMA diagnosis problem is reformulated as a sparse signal recovery problem at the center frequency and sidebands. Then, a method based on the difference of convex sets theory and sequential convex programming (DCS-SCP) is developed to implement diagnosis for impaired TMAs. Using a small number of far-field measurements at the same position but different frequencies, the joint recovery of the equivalent excitations at the center frequency and sidebands is realized by a mixed l0/l2-norm minimization method. The numerical simulation and the successful comparison with the state-of-the-art algorithms demonstrate the superiority of the proposed methods in terms of noise robustness and diagnosis accuracy.Keywords: Array failurecompressed sensingconvex programmingtime-modulated arrays Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsGuo BaiGuo Bai received the B.E. degree in electronic information science and technology from the Chengdu University of Information and Technology, China, in 2019. He is currently pursuing the Ph.D. degree in philosophy with the School of Physical Science and Technology, Southwest Jiaotong University, China., His research interests include antenna array diagnosis algorithms, array synthesis algorithms, computational electromagnetic and electromagnetic optimization algorithms.Cheng LiaoCheng Liao received the Ph.D. degree in electromagnetic fields and microwave techniques from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 1995. From 1997 to 1998, he was a Visiting Scholar at the City University of Hong Kong, Kowloon Tong, Hong Kong. He became a Professor with Southwest Jiaotong University, Chengdu, China, in 1998. His research interests include high-power microwave technology, computational electromagnetic, and antenna.You-Feng ChengYou-Feng Cheng received the Ph.D. degree in radio physics from the University of Electronic Science and Technology of China, Chengdu, China, in 2018. In 2017, he joined the Mechanical Engineering Department, University of Houston, Houston, TX, USA, as a Visiting Scholar. In 2018, he joined Southwest Jiaotong University (SWJTU), Chengdu, China. He is currently an Associate Professor with the Institute of Electromagnetics, SWJTU. He has authored or coauthored more than 40 peer reviewed papers. His research interests include phased arrays, reconfigurable antennas, low-RCS antennas, array analysis and synthesis, and evolutionary algorithms.Yuanzhi LiuYuanzhi Liu (Student Member, IEEE) received the B.Eng. degree in electronics from the Chengdu University of Information Technology, Chengdu, Chin","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135888748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of dielectric response functions for NIR-SWIR absorbing dyes by inverse analysis of diffuse reflectance","authors":"R. Viger, S. Ramsey, T. Mayo, S. G. Lambrakos","doi":"10.1080/09205071.2023.2260381","DOIUrl":"https://doi.org/10.1080/09205071.2023.2260381","url":null,"abstract":"AbstractThis study describes the estimation of dielectric response functions for NIR-SWIR absorbing dyes by inverse analysis of diffuse reflectance. The inverse analysis procedure is based on the Kramers–Kronig relations, the Kubelka–Munk model of diffuse reflectance, and the background subtraction of substrate spectra. The calculated response functions provide estimates of the dielectric response characteristics for NIR-SWIR absorbing dyes, as well as their sensitivity to material-background environments. This study demonstrates that Kramers–Kronig analysis can be adopted for calculating estimates of dielectric functions, given any reasonable estimate of absorbance. Specifically, that Kramers–Kronig analysis provides filtering of dielectric response structure with respect to spectrum artifacts due to inverse-analysis and spectroscopic-measurement procedures. This can significantly reduce the experimentation necessary to achieve desired dielectric response characteristics for NIR-SWIR dye and substrate combinations. Furthermore, these calculated response functions can support the construction of approximate effective medium models capable of estimating reflectance features for dyed fabrics.KEYWORDS: Diffuse reflectanceparametric modelingdyed fabricsabsorption spectra Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis project was supported by US DoD programs.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136210428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniaturized near-field-focused antenna array","authors":"Yinuo Li, Juan Chen, Jianxing Li","doi":"10.1080/09205071.2023.2259052","DOIUrl":"https://doi.org/10.1080/09205071.2023.2259052","url":null,"abstract":"AbstractThis paper presents a microstrip planar antenna array designed for near-field focusing operating at 10 GHz. It is a challenge to reach the phase and amplitude distribution of near-field-focused antenna arrays with small focal spots. The antenna elements of this array are arranged radially on the aperture of only 5.6λ0 × 5.6λ0, which reduces the focal spot diameter. We designed an unequal-amplitude unequal-phase power divider to reach phase distribution and binomial taper distribution. The proposed array suppresses the sidelobes on the focal plane. It increases the electric field intensity by 11.46 dB compared with the horn with the same aperture size and increases 9.42 dB compared with the equal-phase array. The focus spot diameter is only 0.33λ0. The simulated and measured results are in good agreement, which verifies the high performance of the array. This miniaturized high-focus array has a good prospect in near-field applications like wireless energy transmission and industrial detection.KEYWORDS: Microstrip arrayplanar arraynear-field-focusedminiaturization Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundations of China [grant numbers 61971340 and 62122061]; the National Key Research and Development Program of China [grant number 2020YFA0709800]; and the Technology Program of Shenzhen [grant number JCYJ20180508152233431].","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"100 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135193882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}