- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 15th European Radar Conference (EuRAD) - Madrid, Spain (2018.9.26-2018.9.28)] 2018 15th European Radar Conference (EuRAD) - Simulation of Near Field RCS to Reproduce Measurement Condition
摘要： Different approaches are presented to simulate the near field Radar Cross Section (RCS) of a perfectly conducting electrically large object. This type of environment is usually found in measurements at large anechoic chambers where the far field condition cannot be achieved, making it impossible to approximate the incident field by a planewave. Each approach will be implemented with Physical Optics (PO) for extremely large targets and an accelerated version of the Method of Moments for moderately large objects. The fast MoM method are either the Multilevel Adaptive Cross Approximation (MLACA) for an iterative solution or the Multiscale Compressed Block Decomposition (MSCBD) for a direct solution. This development and the performed simulations have been done with CAPITOLE-RCS commercial software developed by NEXIO.
关键词： physical optics,method of moments,radar cross-sections,inverse synthetic aperture radar,Numerical simulation,anechoic chambers
更新于2025-09-10 09:29:36
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SPECTRAL DOMAIN ANALYSIS OF GYROTROPIC ANISOTROPY CHIRAL EFFECT ON THE INPUT IMPEDANCE OF A PRINTED DIPOLE ANTENNA
摘要： A theoretical analysis of a printed dipole antenna on a gyrotropic-anisotropy chiral dielectric substrate is presented. The study is based on numerical techniques for the characterization of electromagnetic propagation in chiral media. The general complex wave equation and the dispersion relation for such a medium are derived in the spectral domain. The spectral Green’s function of a grounded dielectric chiral slab is developed, and the spectral domain moment method impedance matrix elements are calculated. The e?ect of the chiral gyrotropy element on the input impedance of a dipole antenna printed on a grounded chiral substrate is analyzed using the Galerkin-based Method of Moments.
关键词： printed dipole antenna,Method of Moments,Green’s function,gyrotropic-anisotropy chiral dielectric substrate,spectral domain
更新于2025-09-10 09:29:36
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[IEEE 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) - Espoo, Finland (2018.8.27-2018.9.1)] 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) - Analysis of Elliptical Aperture Metasurface Antennas
摘要： A Method of Moments (MoM) based analysis is presented for elliptical aperture metasurface (MTS) antennas. The MTS is represented as a sheet transition impedance boundary condition incorporated in a transmission line which accounts for the substrate interaction with the patches layer. The algorithm uses the Fourier-Bessel basis functions (FBBFs) and is inspired from the circular domain analysis. The computation time is then comparable to that of an equivalent size circular aperture MTS. Numerical results obtained with the proposed method are compared with the full wave Contour-FFT (CFFT) based MoM simulation of a MTS implemented with sub-wavelength printed patches.
关键词： Fourier-Bessel basis functions,Method of Moments,Contour-FFT,elliptical aperture,Metasurface antennas
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) - Nagoya, Japan (2018.8.29-2018.8.31)] 2018 IEEE International Workshop on Electromagnetics:Applications and Student Innovation Competition (iWEM) - A Hybrid MoM/FDTD Method for Exposure Assessment of Wireless Power Transfer Systems
摘要： A hybrid method combining method of moments (MoM) and finite-difference time-domain (FDTD) method is proposed to evaluate exposure in a human body close to wireless power transfer (WPT) systems. Validation of the proposed method has been demonstrated by analysis of a WPT system close to a dielectric cube. Finally, the proposed method was used to determine specific absorption rate inside a human body in the vicinity of a spiral-type WPT system.
关键词： hybrid method,method of moments,exposure assessment,FDTD,wireless power transfer
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - Mauritius (2018.10.15-2018.10.18)] 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - On the Use of Modal Powers and Energies in the Analysis and Design of Metamaterial Structures
摘要： This paper discusses the problem of integrating metamaterial (MTM) structures with antennas. We present a new approach based on the computation of the energies of the surface current modes by means of the theory of characteristic modes (TCM). We also introduce new simple formulation to compute the stored energy using the impedance operation of the method of moment (MoM). This analysis can be done the antenna (driven element) and the inclusion (resonant element).
关键词： method of moments,stored energy,metamaterial-inspired-antennas,characteristic modes,ESA
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Computer Tool for Simulating Frequency Modulated -Continuous Wave Radar Systems in Urban Traffic Scenes
摘要： In this work, a computer tool for the simulation of the responses of Frequency Modulated-Continuous Wave radar systems in Urban Traffic Scenes is presented. The radar echoes including frequency shifts due to distance and object speeds are computed using a new hybrid technique that combines Method of Moments, Physical Optics and Geometrical Theory of Diffraction. Arbitrarily time-shaped radar sequences can be set for obtaining output parameters like Doppler Spectrum, beat signals in frequency and time domains, distances and speeds of echoes, etc. The technique is efficient and accurate for solving the electrically large and multiscale problem that appears in the simulation of these systems in urban complex scenarios. Representative results are presented.
关键词： method of moments,FM-CW radar,hybrid methods,physical optics,geometrical theory of diffraction,anticolision,propagation,antenna,radar
更新于2025-09-04 15:30:14