PWB方法在矩形开孔电大腔中的应用及其拓展

用功率平衡(PWB)方法快速评估了在平面电磁波照射下矩形开孔电大腔内的平均场值水平, 且随着频率的升高, 此结果与全波分析软件所得结果的吻合度越来越高。为了得到更完备的腔内场环境描述, 采用统计的方法生成不同入射频点下的腔内归一化电场模值概率密度函数(PDF)图, 并发现了腔壁电导率的变化对腔内归一化电场模值PDF的影响规律: 在各入射频点下, 随着腔壁电导率从10 S/m逐渐增大到107 S/m, 腔内归一化电场模值PDF曲线越来越趋于平缓并趋于稳定；腔壁电导率为106 S/m和107 S/m时的腔内归一化电场模值PDF非常相似, 以入射波频率在10 GHz时为例, 利用PWB方法的原理说明了上述现象发生的原因。

Abstract

Power Balance(PWB) method is utilized to quickly estimate the magnitude of the mean electric field in an electrically large cavity with rectangular aperture when it is illuminated by a plane electromagnetic wave. As the incident frequency is increased, results obtained by PWB method are more consistent with the results of full-wave analysis software. In order to get more complete information of EM-field environment in the cavity, Probability Distribution Functions(PDFs) of the normalized electric field in the cavity are generated at different incident frequencies. It is found that at each specific frequency when conductivity of the cavity wall gets higher from 10 S/m to107/m, the PDFs get flatter and tend to be stable；and when the conductivity of the cavity wall is 106/m, the PDF of the normalized electric field is similar with the one obtained in the case of 107/m. The reason is explained taking the incident wave frequency of 10 GHz as an example according to PWB.

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欧阳婷, 刘强, 赵翔, 闫丽萍, 周海京, 黄卡玛. PWB方法在矩形开孔电大腔中的应用及其拓展[J]. 太赫兹科学与电子信息学报, 2018, 16(4): 682. OUYANG Ting, LIU Qiang, ZHAO Xiang, YAN Liping, ZHOU Haijing, HUANG Kama. Application and extension of PWB method in an electrically large cavity with rectangular aperture[J]. Journal of terahertz science and electronic information technology, 2018, 16(4): 682.

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