This study investigates the effect of driving frequency on the ability of a dielectric barrier discharge (DBD) plasma to reduce the radar cross section (RCS) in the Ku -band. Analysis based on the Drude model suggests that the electron density of the plasma will increase with the driving frequency, implying that the plasma will be more effective in terms of RCS reduction. Experimental results based on a multifingered DBD generator reveal that an RCS reduction of up to 4.1 dB is achieved at 18 GHz, which is a 1.3 dB increase due to increasing the driving frequency from 1 to 2 kHz. Finally, the electron density, which is extracted by fitting the simulated RCS results, increased by as much as approximately 330% due to the increase in the driving frequency from 1 to 2 kHz. As the driving frequency increases, the frequency of collision between plasma particles increases. Therefore, the ionization of gas molecules is enhanced, resulting in a higher electron density. The experimental results also suggest that enhancement in the RCS reduction is larger when the electric field intensity between the two electrodes of the DBD generator is greater. As a result, the plasma becomes electromagnetically more lossy and is more effective for reducing the RCS. Experimental results are provided and analyzed based on the electromagnetic parameters used for modeling the plasma.

中文翻译：

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驱动频率对减小介质中的介质阻挡放电等离子体引起的雷达横截面的影响 苦-乐队

这项研究调查了驱动频率对介质阻挡放电（DBD）等离子体降低雷达截面（RCS）的能力的影响。 苦 -乐队。基于Drude模型的分析表明，等离子体的电子密度将随驱动频率的增加而增加，这意味着等离子体在RCS降低方面将更加有效。基于多指DBD发生器的实验结果表明，在18 GHz时，RCS降低了4.1 dB，这是由于将驱动频率从1 kHz增加到2 kHz而增加了1.3 dB。最后，由于驱动频率从1 kHz增加到2 kHz，通过拟合模拟的RCS结果提取的电子密度增加了大约330％。随着驱动频率增加，等离子体颗粒之间的碰撞频率增加。因此，增强了气体分子的电离，导致更高的电子密度。实验结果还表明，当DBD发生器的两个电极之间的电场强度更大时，RCS减小的增强更大。结果，等离子体在电磁上变得更具损耗，并且对于减小RCS更有效。基于用于建模血浆的电磁参数，提供并分析了实验结果。