研究目的
To simulate the near field Radar Cross Section (RCS) of a perfectly conducting electrically large object, addressing the challenge of measurements at large anechoic chambers where the far field condition cannot be achieved.
研究成果
Two distinct methods have been developed to approximate the near field RCS of targets, using either the Method of Moments (rigorous) or the Physical Optics (high frequency) methods. Numerical experiments have validated each approach, showing that the MoM procedure is a good choice when the complexity of the object increases, making the PO method inaccurate.
研究不足
The Physical Optics (PO) method, while efficient, has limitations in terms of precision depending on the complexity of the object. The Method of Moments (MoM) is more rigorous but demands more computational resources.
1：Experimental Design and Method Selection:
The study employs Physical Optics (PO) for extremely large targets and an accelerated version of the Method of Moments (MoM) for moderately large objects, specifically the Multilevel Adaptive Cross Approximation (MLACA) for iterative solutions and the Multiscale Compressed Block Decomposition (MSCBD) for direct solutions.
2：Sample Selection and Data Sources:
The experiments involve simulations of perfectly conducting objects such as a cylinder, a circular disc, and a rectangular plate at various frequencies.
3：List of Experimental Equipment and Materials:
CAPITOLE-RCS commercial software developed by NEXIO is used for simulations.
4：Experimental Procedures and Operational Workflow:
The study compares two approaches to simulate near field RCS: one using a spherical wave source and the other using dipole sources with normalization.
5：Data Analysis Methods:
The results are analyzed by comparing near field RCS simulations with far field RCS simulations and ISAR images, including the use of a Near Field to Far Field (NF2FF) transformation.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
