Enhanced Q high dielectric constant material for microwave applications
AssigneeSkyworks Solutions, Inc.
InventorMichael David Hill
Life of this patent
Estimating the term…
Abstract
Enhanced Q high dielectric constant material for microwave applications. In some embodiments, a composition can include a material with a formula Ba4+xSm(2/3)(14−x+0.5y)Ti18−yAlyO54, with the quantity y being in a range 0<y<2, and the quantity x being in a range 0<x<2−y. Such a material can have a dielectric constant value greater than 60 and a Qf value greater than 10,000 at a frequency (f) at or less than 1 GHz. In some embodiments, a material having such properties can be implemented as a ceramic device and be utilized as a dielectric microwave resonator. Such a microwave resonator can be utilized as, for example, a narrowband radio-frequency (RF) filter.
Claims20
A composition comprising a material with a formula Ba4+xSm(2/3)(14−x+0.5y)Ti18−yAlyO54, the quantity y being in a range 0<y<2, the quantity x being in a range 0<x<2−y.
A dielectric resonator comprising a ceramic device configured as a microwave resonator, the ceramic device including a material with a formula Ba4+xSm(2/3)(14−x+0.5y)Ti18−yAlyO54, the quantity y being in a range 0<y<2, the quantity x being in a range 0<x<2−y.
A method for fabricating a tungsten bronze material, the method comprising:
- in a material having rhombic (A1) sites, pentagonal (A2) sites, and titanium (Ti) in octahedral sites, substituting aluminum (Al) for at least some of the titanium (Ti) in the respective octahedral sites to provide a dielectric constant value greater than 60 and a Qf value greater than 10,000 at a frequency (f), with the quantity Q being a quality factor, and the quantity f being a frequency expressed in GHz and less than 1 GHz;
- and
- adjusting contents of the A1 sites and the A2 sites to compensate for charge imbalance resulting from the aluminum substitution of titanium.
Dependencies are inferred from the claim text.