Sajjad Taravati;Ahmed A. Kishk;George V. Eleftheriades
{"title":"Finite-Difference Time-Domain Simulation of Wave Propagation in Space-Time-Varying Media: Derivation of schemes, extended framework, and illustrative examples.","authors":"Sajjad Taravati;Ahmed A. Kishk;George V. Eleftheriades","doi":"10.1109/MAP.2025.3555843","DOIUrl":"https://doi.org/10.1109/MAP.2025.3555843","url":null,"abstract":"We present a comprehensive tutorial on the finite-difference time-domain (FDTD) modeling of space, time, and space-time-varying media, building upon our previous review by offering a detailed, step-by-step guide for numerical simulations. This manuscript emphasizes practical computational methodologies and examines the dynamic behavior of both TE and TM electromagnetic fields under oblique incidence on space-time-modulated gratings, in which electrical permittivity, magnetic permeability, and conductivity vary in both space and time. The article details the derivation of the FDTD schemes, including the Courant-Friedrichs-Lewy (CFL) stability condition, explicit formulations for TE and TM wave illuminations, and the implementation of appropriate boundary conditions. In addition, we extend the FDTD framework to incorporate nonlinear effects, thereby broadening its applicability to advanced applications in wireless communications, quantum technologies, and radars. Engaging illustrative examples are provided to demonstrate the versatility and practical relevance of the approach.","PeriodicalId":13090,"journal":{"name":"IEEE Antennas and Propagation Magazine","volume":"68 4","pages":"21-32"},"PeriodicalIF":3.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750169","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}
{"title":"IEEE Member Discount","authors":"","doi":"10.1109/MAP.2026.3715253","DOIUrl":"https://doi.org/10.1109/MAP.2026.3715253","url":null,"abstract":"","PeriodicalId":13090,"journal":{"name":"IEEE Antennas and Propagation Magazine","volume":"68 4","pages":"53-53"},"PeriodicalIF":3.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11657557","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750172","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}
{"title":"Electrodynamics for Nonrelativistic Point Charges in Electrical Engineering: A framework based on Maxwell’s equations and Ampère’s original force law","authors":"Steffen Kühn","doi":"10.1109/MAP.2025.3555924","DOIUrl":"https://doi.org/10.1109/MAP.2025.3555924","url":null,"abstract":"Measuring and visualizing the relative strength of data sets in machine learning can be highly useful. Combinatorial methods effectively measure coverage of interactions between features, an essential consideration in judging data adequacy for training and testing.","PeriodicalId":13090,"journal":{"name":"IEEE Antennas and Propagation Magazine","volume":"68 4","pages":"10-20"},"PeriodicalIF":3.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148746879","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}
{"title":"Antennas Blossomed in the Swinging 1960s: Part 1: Theory and applications. [Historically Speaking]","authors":"Trevor S. Bird","doi":"10.1109/MAP.2026.3702587","DOIUrl":"https://doi.org/10.1109/MAP.2026.3702587","url":null,"abstract":"The significant demographic shifts that occurred in the 1960s became a driving force for social and cultural change. Innovations like television (TV) and transistor radios had changed how people consume media and spent their leisure time, impacting culture and communication. These aspects are discussed as well as some novel approaches in electromagnetics, methods such as computing, and applications that arose during the decade. This is the first part of a third article on the history of antennas in “Historically Speaking” commencing from the end of World War II (WWII) and finishing in 1970. The 50 years covered saw antennas grow from a required component of radio to a multidisciplinary area covering many applications, computing, design tools, materials, and deeper theories.","PeriodicalId":13090,"journal":{"name":"IEEE Antennas and Propagation Magazine","volume":"68 4","pages":"58-67"},"PeriodicalIF":3.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750173","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}
{"title":"The Joys, Challenges, and Value of Academic Collaboration: Experiences and insights from a personal journey. [Young Professionals]","authors":"Krishnasamy Selvan","doi":"10.1109/MAP.2026.3702585","DOIUrl":"https://doi.org/10.1109/MAP.2026.3702585","url":null,"abstract":"","PeriodicalId":13090,"journal":{"name":"IEEE Antennas and Propagation Magazine","volume":"68 4","pages":"75-79"},"PeriodicalIF":3.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11657480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750182","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}