Magneto-dielectric substrates with thin magnetic films show great potential in realizing electrically small antennas with enhanced bandwidth, improved directivity, and high efficiency. This is the first time to introduce 10-μm thick self-biased NiCo-ferrite films as a practical means to tune a patch antenna by loading Ferrite/Rogers/Ferrite (F/R/F) sandwich structures. The central resonant frequency of the base line patch antenna with composite of Rogers and alumina substrate is 2460 MHz with a bandwidth of 42 MHz. However, with F/R/F loading of the alumina substrate, this frequency is down shifted to 2380 MHz with a greatly improved bandwidth of 74 MHz. In addition, the gain of the magnetic antenna with F/R/F sandwich structure is enhanced by 2.4 dB over the unloaded antenna.
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机译：具有薄磁性膜的磁电介质基板在实现具有增强的带宽，改善的方向性和高效率的电小型天线方面显示出巨大的潜力。这是首次引入10μm厚的自偏置NiCo铁氧体薄膜，作为通过加载铁氧体/罗杰斯/铁氧体（F / R / F）夹层结构来调谐贴片天线的实用方法。具有罗杰斯和氧化铝衬底的复合材料的基线贴片天线的中心谐振频率为2460 MHz，带宽为42 MHz。但是，在氧化铝基板的F / R / F加载下，该频率下移至2380 MHz，带宽大大提高了74 MHz。此外，具有F / R / F夹层结构的磁性天线的增益比空载天线提高了2.4 dB。
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