Wide band stop band filter including a ferrite region biased by a graded magnetic field专利检索-带状线电缆，导体和接线专利检索查询-专利查询网

Wide band stop band filter including a ferrite region biased by a graded magnetic field

阅读：931发布：2023-01-11

专利汇可以提供Wide band stop band filter including a ferrite region biased by a graded magnetic field专利检索，专利查询，专利分析的服务。并且A stripline conductor is sandwiched between two ferrite slabs which, in turn, are sandwiched between two magnetic pole pieces. The pole pieces are in contact with opposite poles of a permanent magnet, placing the ferrite slabs in a magnetic field. The distance between the pole pieces varies along the length of the stripline, causing the magnetic field to be nonuniform. The ferrite slabs will absorb electromagnetic radiation at a frequency determined by the magnetic field strength and thus signals on the stripline will be absorbed in a frequency band determined by the range of magnetic field strengths along the length of the stripline.，下面是Wide band stop band filter including a ferrite region biased by a graded magnetic field专利的具体信息内容。

权利要求

1. A band stop filter comprising: a transmission line having a first and a second conductor electrically insulated from one another for propagating electromagnetic waves; a piece of ferrite substantially filling the space between the first and second conductors of the transmission line in a region having a magnetic field component of an electromagnetic wave propagating along the transmission line; and magnetic means for producing a magnetic field varying along the direction of propagation of the electromagnetic wave on the transmission line and having a component normal to said magnetic field component of the electromagnetic wave, in the region containing the piece of ferrite.

2. A band stop filter as in claim 1 wherein the first conductor is a flat stripline having a first ferrite slab in contact with one side and a second ferrite slab in contact with the other side thereof and the second conductor is supported in part by a surface of the first ferrite slab opposite the stripline and a surface of the second ferrite slab opposite the stripline.

3. A band stop filter as in claim 2 wherein the magnetic means comprises a magnet and first and second magnetic pole pieces, the first magnetic pole piece being adjacent the surface of the first ferrite slab opposite the stripline and connected to a first pole of the magnet, the second magnetic pole piece being adjacent the surface of the second ferrite slab opposite the stripline and connected to a second pole of the magnet, and the separation of the first and second magnetic pole pieces varying along the length of the striplIne.

4. A band stop filter as in claim 3 including magnetic circuit means wherein the magnetic means is symmetrical about the first conductor; the first magnetic pole piece being in contact with the conductor on the surface of the first ferrite slab opposite the stripline and; the second magnetic pole piece being in contact with the conductor on the surface of the second ferrite slab opposite the stripline and connected to the second pole of the magnet via the magnetic circuit means.

5. A band stop filter as in claim 4 wherein the separation of the first and second magnetic pole pieces varies monotonically with distance along the stripline.

6. A band stop filter as in claim 4 wherein the separation of the first and second magnetic pole pieces is substantially the same at each extreme of the stripline and increases to a greater, maximum value at a point approximately half way between the extremes of the stripline.

7. A band stop filter as in claim 5 wherein each magnetic pole piece has a notch in an end having the greatest thickness and nearest a ferrite slab for reducing fringing magnetic fields at the end of greatest separation between the pole pieces.

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Wide band stop band filter including a ferrite region biased by a graded magnetic field

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