摘要
研究了由双层磁化铁氧体构成的磁感应波器件的微波透射性能以及场致频率可调特性,并探讨了结构参数对微波性能的影响.两磁化铁氧体平板样品平行放置,由于间隙处表面波共振模强烈耦合产生磁感应波透过样品,在铁磁共振产生的微波禁带频率范围内产生一个显著的通带.通带的中心频率随着偏置磁场的增强而单调上升,显示出很好的场致频率可调性.随着两铁氧体之间间距的增加,界面耦合作用减弱,透射通带的半高宽逐渐降低,损耗增加.
The transmission properties and magnetotunability of a magnetoinductive device with bilayered ferrite structure were investigated, and the effect of structural parameters on the properties of microwave was discussed. When two magnetized ferrite slabs are parallelly placed, the coupling of the resonanting modes of surface wave results in magnetoinductive wave, which propagates across the composite structure. In the transmission spectra, a passband appears in the frequency range of the forbidden band which is produced by ferromagnetic resonance. The center frequency of the passband shifts to a higher frequency when the bias magnetic field increases. That is good magnetotunability. With the increase of the distance between the two ferrite slabs, the coupling between surface waves fades gradually, the half-width decreases, and the transmission loss increases.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2009年第8期1033-1037,共5页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(No.50702005)
关键词
铁氧体
可调
磁感应波
铁磁共振
ferrite
tunable
magnetoinductive wave
ferromagnetic resonance
