| 基于FDTD的时域混合方法及其在天线前门耦合数值模拟中的应用 |
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| 引用本文： | 鲍献丰,陈晓洁,李瀚宇,刘昌,周海京.基于FDTD的时域混合方法及其在天线前门耦合数值模拟中的应用[J].强激光与粒子束,2021,33(12):123017-1-123017-6. |
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| 作者姓名： | 鲍献丰 陈晓洁 李瀚宇 刘昌 周海京 |
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| 作者单位： | 1.中物院高性能数值模拟软件中心, 北京 100088 |
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| 基金项目： | 国防基础科研计划项目（C1520110002）；国家自然科学基金项目（61771061） |
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| 摘 要： | 强电磁脉冲环境下的平台-机载天线一体化耦合计算属于典型多尺度时域电磁计算问题，采用传统的FDTD方法数值模拟时，由于精细结构的存在导致网格量巨大，计算效率低下。介绍了一种将非均匀FDTD方法与细导线FDTD方法以及多网格集总元件FDTD方法相结合的时域混合方法，能够有效降低计算开销，结合并行计算技术，快速计算得到天线端口上耦合产生的瞬态电压和电流响应，并将该方法成功应用于无人机平台-天线一体化前门耦合数值模拟中。
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| 关 键 词： | 强电磁脉冲 电磁环境效应 平台-机载天线一体化数值模拟 细导线 集总元件 |
| 收稿时间： | 2021-05-21 |
FDTD-based time domain hybrid method and its application in numerical simulation of platform-antenna integrated coupling |
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| Affiliation: | 1.CAEP Software Center for High Performance Numerical Simulation, Beijing 100088, China2.Institute of Applied Physics and Computational Mathematics, Beijing 100088, China3.Complicated Electromagnetic Environment Laboratory of China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | Intense electromagnetic pulse has posed a direct threat to dense electronic platforms such as aircraft. Antenna structure is an important coupling channel for intense electromagnetic pulse (EMP) entering the aircraft platform to produce electromagnetic environmental effects. It is of great significance to analyze the electromagnetic coupling response of platform airborne antenna through numerical simulation. The platform-antenna integrated coupling simulation is a typical method to solve multi-scale time-domain electromagnetic calculation problem. The tens meter platform contains hundreds of micro meter microstrip lines, circuit elements and other local fine structures. When the traditional FDTD method is used to simulate this kind of problems, the computational efficiency is very low due to the need of grid division. This paper introduces a time-domain hybrid method, which combines the non-uniform FDTD method with the thin wire FDTD method and the multi grid lumped element FDTD method, thus can effectively reduce the computational overheads. Combined with parallel computing technology, the transient voltage and current response of the antenna port can be calculated quickly. The method is successfully applied to the numerical simulation of UAV platform antenna integrated coupling. |
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