ABSTRACT With space and spectrum at a premium, antennas must be capable of operating well across a variety of frequencies and environments. This work presents a novel method of frequency and impedance reconfiguration through the actuation of a ferrofluid load with a permanent magnetic bias field, while still achieving up to 85% efficiency. Under a sufficiently strong bias field, the ferrofluid load behaves as a low-loss movable dielectric load, and the actuation method avoids the complexity associated with microfluidic pumps and DC bias networks. This work opens a new field of reconfiguration mechanisms for antennas through magnetic repositioning of low-loss ferrofluid loads.

中文翻译：

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使用磁驱动低损耗磁流体负载的频率和阻抗可重构天线

摘要 由于空间和频谱非常宝贵，天线必须能够在各种频率和环境中良好运行。这项工作提出了一种通过用永磁偏置场驱动铁磁流体负载来重新配置频率和阻抗的新方法，同时仍能实现高达 85% 的效率。在足够强的偏置场下，铁磁流体负载表现为低损耗可移动介电负载，并且驱动方法避免了与微流体泵和直流偏置网络相关的复杂性。这项工作通过低损耗铁磁流体负载的磁性重新定位为天线重新配置机制开辟了一个新领域。