A magnetically- and electrically-tunable microwave phase shifter using yttrium iron garnet/gadolinium gallium garnet thin film
A magnetically- and electrically-tunable microwave phase shifter using yttrium iron garnet/gadolinium gallium garnet thin film
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DOI：
10.1063/1.3671779
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发表时间：
2012-04-01
影响因子：
3.2
通讯作者：
Tsai, Chen S.
中科院分区：
文献类型：
--
作者：
Zhu, Yun;Qiu, Gang;Tsai, Chen S.
报道了一种新型的可调谐微波移相器，它将基于铁磁共振(FMR)的磁调谐和变容管加载的复合带通滤波器中的直流电调相结合。对于10.37~10.87 GHz的频率范围，首先通过施加6~18V的反向偏置电压获得147.5~280度的相移，然后通过在2700~3450Oe的偏置磁场中改变偏置磁场来使总相移增加到406.5度。相应的插入损耗变化为61.5分贝。对于其他频率范围，也可以通过改变偏置磁场和相应的FMR频率来获得类似的性能数据。因此，复合移相器已经清楚地证明了它能够在很宽的工作频率范围内以适度的插入损耗变化实现大的、连续可调的相移。(C)2012年美国物理研究所。[DOI：10.1063/1.3671779]
A new type of tunable microwave phase shifter that combines ferromagnetic resonance (FMR)-based magnetic tuning in a yttrium iron garnet-thin-film and DC electrical tuning in a varactor-loaded composite band-pass filter is reported. For the frequency range of 10.37 to 10.87 GHz, a phase shift of 147.5 to 280 degrees was first obtained by applying a reversed bias voltage from 6 to 18 V, and the total phase shift was subsequently increased to 406.5 degrees by varying the bias magnetic field from 2700 to 3450 Oe. The corresponding insertion loss variation measured 61.5 dB. Similar performance figures could also be obtained for other frequency ranges by varying the bias magnetic field and the corresponding FMR frequency. Thus, the composite phase shifter has clearly demonstrated its capability for a large and continuously tunable phase shift with a moderate insertion loss variation over a wide range of operating frequencies. (C) 2012 American Institute of Physics. [doi:10.1063/1.3671779]