Circulator element

Details Circulator element Circulator element

2007-10-23

2007-10-23

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Nonreciprocal gyromagnetic type

C333S024200

Reexamination Certificate

active

11175930

ABSTRACT:
A technique for improving a circulator element for its temperature characteristic is provided. A circulator element including a garnet type ferrite material, and a permanent magnet for applying a direct-current magnetic field to the garnet type ferrite material, wherein S11represents the saturation magnetization of said garnet type ferrite material at a temperature T1,S12represents one at a temperature T2,and S13represents one at a temperature T3;and S21represents the saturation magnetization of said permanent magnet at a temperature T1,S22represents one at a temperature T2,and S23represents one at a temperature T3,where T1<T2<T3,and the saturation magnetizations S11,S12,S13,S21,S22and S23are relative values providing that the saturation magnetizations at the temperature T2is 1, andwherein the relationsin-line-formulae description="In-line Formulae" end="lead"?|(S12−S11)/(T2−T1)|<|(S22−S21)/(T2−T1)| andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?|(S13−S12)/(T3−T2)|>|(S23−S22)/(T3−T2)| are satisfied.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
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