US 12,261,344 B2
High saturation magnetization and high dielectric constant ferrites
Michael David Hill, Emmitsburg, MD (US); David Bowie Cruickshank, Rockville, MD (US); Iain Alexander Macfarlane, Insch (GB); Srinivas Polisetty, Frederick, MD (US); James Gerard O'Callaghan, Cork (IE); and Scott David Wilson, Cork (IE)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Sep. 29, 2022, as Appl. No. 17/936,795.
Claims priority of provisional application 63/263,151, filed on Oct. 27, 2021.
Claims priority of provisional application 63/250,888, filed on Sep. 30, 2021.
Prior Publication US 2023/0096130 A1, Mar. 30, 2023
Int. Cl. H01P 1/387 (2006.01); C04B 35/26 (2006.01); C04B 35/505 (2006.01); H01F 1/34 (2006.01); H01F 1/44 (2006.01)
CPC H01P 1/387 (2013.01) [C04B 35/2675 (2013.01); C04B 35/505 (2013.01); H01F 1/344 (2013.01); C04B 2235/3274 (2013.01); C04B 2235/764 (2013.01); C04B 2235/94 (2013.01); C04B 2235/96 (2013.01)] 20 Claims
OG exemplary drawing
 
16. A radio frequency (RF) circulator comprising:
a ceramic disk formed of a ceramic material having a chemical formula represented by Bi1.0+aY2.0−a−x−2yCax+2yFe5−x−yMIVyO12, MIV being Zr, Sn or Ti, 0<x<0.5, 0≤y≤0.25, and 0≤a≤0.5, and the ceramic material has a composition such that a normalized change (Δ4πMs) in saturation magnetization (Ms), defined as Δ4πMs=[(4πMs at 20° C.)−(4πMs at 120° C.)]/(4πMs at 20° C.), is less than about 0.35.