| 摘要 |
A ferrite structure for non-reciprocal microwave device such as circulator/isolator. The structure includes one or more composite ferrite bodies, each having at least one region of soft ferrite material and at least one region of hard ferrite material, and at least two ferrous/ferrite plates. The ferrous/ferrite plates are attached to the composite ferrites so as to contribute to the completion of magnetic loop via hard and soft ferrite regions of the composite ferrites. The soft and hard ferrite regions are magnetized in the opposite direction. The range of operation is selected to be between the resonant frequencies of soft and hard ferrite materials. With such setting the hard and soft ferrite regions provide the circulation in the same direction. As compared to the state-of-the art devices, the circulators/isolators made according to the present invention incorporate the confined-flux self-magnetized ferrite structure, thus eliminating the use of conventional magnets. This devices have extended bandwidth, are reliable in operation and inexpensive in production. The structure according to the present invention is very compact, lightweight and broadband.
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