线电流源激励下无耗异向介质层覆盖导体圆柱的辐射特性分析

Radiation character of a line source scattered by a conducting cylinder coated with left handed metamaterial

基于时域有限差分法(FDTD)分析了线电流源激励下无耗异向介质层覆盖的无限长导体圆柱的辐射特性.仿真结果表明,由于异向介质的负折射特性,导体圆柱的辐射方向性将会增强.同时,当模型具有合适的几何和电磁参数时,导体圆柱将可以实现定向辐射.

Based on FDTD method,we analyze the electromagnetic radiation character of a electric line source scattered by an infinite conducting cylinder coated with lossless metamaterial.The simulation results show that because of the negative refraction phenomenon of the metamaterial,the radiation directivity of the conducting cylinder will be improved.If the model has the moderate geometric and electromagnetic parameters,the conducting cylinder coated with metamaterial can obtain the directive radiation.