Ultra-high dielectric constant garnet
AssigneeSkyworks Solutions, Inc.
InventorsDavid Bowie Cruickshank, Michael David Hill
Life of this patent
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Abstract
Disclosed are embodiments of synthetic garnet materials for use in radiofrequency applications. In some embodiments, increased amounts of bismuth can be added into specific sites in the crystal structure of the synthetic garnet in order to boost certain properties, such as the dielectric constant and magnetization. Accordingly, embodiments of the disclosed materials can be used in high frequency applications, such as in base station antennas.
Claims20
A synthetic garnet material comprising a structure including dodecahedral sites, the structure having bismuth occupying at least some of the dodecahedral sites and the structure having gadolinium, and the garnet material having a dielectric constant value of at least 31.
A synthetic garnet material comprising a structure including dodecahedral sites, between 1.4 and 2.5 units of bismuth occupying at least some of the dodecahedral sites, and the garnet material having a dielectric constant value of at least 31.
A synthetic garnet material comprising a structure including dodecahedral sites, bismuth occupying at least some of the dodecahedral sites, and the garnet material having a dielectric constant value of at least 34.
A modified synthetic garnet composition represented by the formula:
- BixCayGdzY3-x-y-zFe5-yZryO12, x being between 1.0 and 2.0, y being between 0.1 and 0.8, and z being between 0.2 and 1.9.
A modified synthetic garnet composition represented by the formula:
- BixCayGdzY3-x-y-zFe5-yZryO12, the modified synthetic garnet composition having a dielectric constant of at least 34.
A method of manufacturing a synthetic garnet having a high dielectric constant, the method comprising:
- providing a yttrium iron garnet structure;
- and
- inserting greater than 1.4 units of bismuth into the iron garnet structure to form a modified synthetic garnet structure without sillenite as a second phase, the modified synthetic garnet having a dielectric constant of at least 34.
Dependencies are inferred from the claim text.