	US 9,812,753 B2
	Radiofrequency and other electronic devices formed from enhanced resonant frequency hexaferrite materials
Michael D. Hill, Frederick, MD (US)
Assigned to Skyworks Solutions, Inc., Woburn, MA (US)
Filed by SKYWORKS SOLUTIONS, INC., Woburn, MA (US)
Filed on Jun. 24, 2013, as Appl. No. 13/925,142.
Application 13/925,142 is a division of application No. 13/314,106, filed on Dec. 7, 2011, granted, now 8,609,062.
Claims priority of provisional application 61/420,625, filed on Dec. 7, 2010.
Claims priority of provisional application 61/435,608, filed on Jan. 24, 2011.
Prior Publication US 2013/0285874 A1, Oct. 31, 2013
Int. Cl. H01B 1/08 (2006.01); H04B 1/00 (2006.01); H01P 1/00 (2006.01); H01P 1/397 (2006.01); H04B 1/38 (2015.01); C04B 35/64 (2006.01); H01Q 1/50 (2006.01); C04B 35/26 (2006.01); C04B 35/624 (2006.01); C04B 35/626 (2006.01); H01F 1/34 (2006.01); C01G 49/00 (2006.01); C01G 51/00 (2006.01)

CPC H01P 1/397 (2013.01) [C01G 49/0036 (2013.01); C01G 51/40 (2013.01); C04B 35/26 (2013.01); C04B 35/624 (2013.01); C04B 35/6261 (2013.01); C04B 35/62625 (2013.01); C04B 35/64 (2013.01); H01B 1/08 (2013.01); H01F 1/348 (2013.01); H01Q 1/50 (2013.01); H04B 1/38 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3277 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/604 (2013.01); C04B 2235/6021 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6565 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/767 (2013.01)]

20 Claims

1. A radio-frequency telecommunication system having increased resonant frequency comprising:

a transceiver;

a synthesizer;

transmit and receive filters;

an antenna; and

at least one magnetic isolator including Z-phase barium cobalt hexagonal ferrite material having the formula Ba₃Co₂Fe₂₄O₄₁formed from fine grain hexagonal ferrite powder having an average particle size of between 300-600 nm and sintered at a temperature between 1100 and 1250° C.