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本文实现了一种新颖的等效环路有限差分算法,这种算法借鉴传输线算法的思想,在Yee氏网格中引入等效集总元件,包括常规介质中的等效串联电感、并联电容和左手材料中的等效并联电感、串联电容等.良好的物理思想使其可以提供适用色散介质计算的收敛性条件,更加适合仿真计算频率选择表面和超材料等色散介质.为了提高其计算效率,研究了核内加速技术,这种技术理论上可达到最高4倍的加速,实际应用中得到2倍左右的加速效果.使用该算法进行了超材料吸波体结构的设计,通过单双环电阻加载实现宽带电磁波吸收功能.隐身天线罩对于实现天线的带外隐身有着重要作用,利用该算法设计了工作频率为1GHz,隐身频带在3GHz到9GHz的天线罩.并与两个加工样品的测量结果进行了比较,对比的结果验证了算法的正确性.同时核内加速技术的有效性也通过仿真时间比较得到了验证.
In this paper, a novel equivalent finite-difference loop algorithm is proposed. This algorithm draws on the idea of transmission line algorithm and introduces equivalent lumped components in Yee’s grid, including equivalent series inductance, shunt capacitance and Equivalent parallel inductance in the left-handed material, series capacitance, etc. Good physical thought makes it possible to provide convergence conditions suitable for the calculation of dispersion media and is more suitable for the simulation of dispersion media such as frequency-selective surfaces and metamaterials. In order to improve its computational efficiency, In this paper, we study the nuclear acceleration technology, which can theoretically accelerate up to 4 times, and get about 2 times acceleration effect in practical applications.We use this algorithm to design the structure of the meta-material absorber, To realize the function of broadband electromagnetic wave absorption.The concealment radome has an important function to realize the out-of-band stealth of the antenna.It uses this algorithm to design the radome with the operating frequency of 1GHz and the stealth band from 3GHz to 9GHz.And with the measurement result of two processing samples The comparison results verify the correctness of the algorithm.At the same time, the effectiveness of nuclear acceleration technology is also compared through the simulation time To verify.