Due to the unique nonreciprocal characteristic, ferrite exhibits anisotropic behaviour in electric performance. Owing to such special phenomenon, it is difficult to efficiently analyse and simulate the ferrite material. Here, an alternative scheme is proposed for the bandpass ferrite finite-difference time-domain simulation. This algorithm is carried out which is based on approximate Crank–Nicolson procedure and incorporated with the complex method and higher-order formulation. The ferrite material can be calculated by the modified auxiliary differential equation approach according to the bandpass sampling theorem. The introduction of numerical example validates the effectiveness. As shown in the results, the proposed scheme can take advantage of these methods which can be demonstrated from the aspect of accuracy, efficiency and absorption. In addition, the proposed scheme can solve the time increment problem caused by the solution of tri-diagonal matrices during the simulation of implicit algorithms.

由于独特的非互易特性，铁氧体在电气性能上表现出各向异性行为。由于这种特殊现象，很难有效地分析和模拟铁氧体材料。在这里，提出了一种用于带通铁氧体有限差分时域仿真的替代方案。该算法是基于近似 Crank-Nicolson 过程并结合复杂方法和高阶公式进行的。铁氧体材料可以根据带通采样定理通过修正的辅助微分方程方法计算。数值例子的引入验证了有效性。结果表明，所提出的方案可以利用这些方法，这可以从准确性、效率和吸收方面进行证明。