{"title":"验证基于边界松弛的长波近场散射模拟器","authors":"W. Clint Snider;Robert C. Moore","doi":"10.1109/TAP.2024.3484532","DOIUrl":null,"url":null,"abstract":"This article presents a numerical model that calculates radio wave scattering from electrically small perfect electric conductors in the near-field of the scattering bodies. The tool is referred to as the long-wavelength, near-field scattering (LWNFS) model, and it is based on electrostatic and magnetostatic field solutions calculated using a boundary-relaxation technique at the edge of the numerical grid space. Electrostatic and magnetostatic solutions are used to approximate the solutions in the slow-time-varying limit. Field tests are performed and analyzed to assess the accuracy of the LWNFS model using measurements of very-low-frequency (VLF) transmitter signals scattered by electrically small metallic boxes with different shapes. Because the amplitudes of the VLF transmitter signals can vary over time, a validation technique using normalized field values is employed: measurements are interpreted using the normalized Stokes parameters of the VLF transmitter signals. Excellent agreement between experimental observations and the predictions of the LWNFS model is demonstrated for a variety of cases. Cases where the LWNFS model is not accurate are highlighted and sources of error are considered.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"72 12","pages":"9355-9365"},"PeriodicalIF":4.6000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Validation of a Long-Wavelength, Near-Field Scattering Simulator Based on Boundary Relaxation\",\"authors\":\"W. Clint Snider;Robert C. Moore\",\"doi\":\"10.1109/TAP.2024.3484532\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This article presents a numerical model that calculates radio wave scattering from electrically small perfect electric conductors in the near-field of the scattering bodies. The tool is referred to as the long-wavelength, near-field scattering (LWNFS) model, and it is based on electrostatic and magnetostatic field solutions calculated using a boundary-relaxation technique at the edge of the numerical grid space. Electrostatic and magnetostatic solutions are used to approximate the solutions in the slow-time-varying limit. Field tests are performed and analyzed to assess the accuracy of the LWNFS model using measurements of very-low-frequency (VLF) transmitter signals scattered by electrically small metallic boxes with different shapes. Because the amplitudes of the VLF transmitter signals can vary over time, a validation technique using normalized field values is employed: measurements are interpreted using the normalized Stokes parameters of the VLF transmitter signals. Excellent agreement between experimental observations and the predictions of the LWNFS model is demonstrated for a variety of cases. Cases where the LWNFS model is not accurate are highlighted and sources of error are considered.\",\"PeriodicalId\":13102,\"journal\":{\"name\":\"IEEE Transactions on Antennas and Propagation\",\"volume\":\"72 12\",\"pages\":\"9355-9365\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-10-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Antennas and Propagation\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10736934/\",\"RegionNum\":1,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Antennas and Propagation","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10736934/","RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Validation of a Long-Wavelength, Near-Field Scattering Simulator Based on Boundary Relaxation
This article presents a numerical model that calculates radio wave scattering from electrically small perfect electric conductors in the near-field of the scattering bodies. The tool is referred to as the long-wavelength, near-field scattering (LWNFS) model, and it is based on electrostatic and magnetostatic field solutions calculated using a boundary-relaxation technique at the edge of the numerical grid space. Electrostatic and magnetostatic solutions are used to approximate the solutions in the slow-time-varying limit. Field tests are performed and analyzed to assess the accuracy of the LWNFS model using measurements of very-low-frequency (VLF) transmitter signals scattered by electrically small metallic boxes with different shapes. Because the amplitudes of the VLF transmitter signals can vary over time, a validation technique using normalized field values is employed: measurements are interpreted using the normalized Stokes parameters of the VLF transmitter signals. Excellent agreement between experimental observations and the predictions of the LWNFS model is demonstrated for a variety of cases. Cases where the LWNFS model is not accurate are highlighted and sources of error are considered.
期刊介绍:
IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques