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US 10,032,547 B2Granted
Increased resonant frequency alkali-doped Y-phase hexagonal ferrites
AssigneeSkyworks Solutions, Inc.
InventorMichael David Hill
Life of this patent
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Abstract
Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material, such as Y-phase hexagonal ferrite material, and methods of manufacturing. In some embodiments, sodium or potassium can be added into the crystal structure of the hexagonal ferrite material in order to achieve improved resonant frequencies in the range of 500 MHz to 1 GHz useful for radiofrequency applications.
Claims20
A method for increasing the resonant frequency of a hexagonal ferrite material, the method comprising:
- providing a Y phase hexagonal ferrite material having the composition Sr2Co2Fe12O22;
- and
- doping the hexagonal ferrite with Na, K or other univalent alkali metal on an Sr site and charge compensating with scandium or indium on a cobalt site.
A hexagonal ferrite material having enhanced resonant frequency comprising:
- a Y phase hexagonal ferrite material having the composition Sr2Co2Fe12O22, the material being doped with Na, K or other univalent alkali metal on an Sr site and including scandium or indium on a cobalt site.
A radiofrequency device comprising:
- a Y phase hexagonal ferrite material having the composition Sr2Co2Fe12O22, the material being doped with Na, K or other univalent alkali metal on an Sr site and including scandium or indium on a cobalt site.
Dependencies are inferred from the claim text.