Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1989-02-21
1991-01-08
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333205, 3332192, 333235, H01P 1215
Patent
active
049839365
ABSTRACT:
A ferromagnetic resonance device is disclosed which utilize the perpendicular resonance of ferrimagnetic YIG thin film operable under a D.C. bias magnetic field perpendicular to a major surface of the YIG thin film element. By making the YIG thin film to have a major surface thereof (100) crystal plane of YIG or (111) crystal plane of a substituted YIG having reduced Ku value, lower limit of resonance frequency is extremely lowered. Thus wide range variable filter device can be obtained.
REFERENCES:
patent: 4197517 (1980-04-01), Vittoria
patent: 4291283 (1981-09-01), Castera
patent: 4555683 (1985-11-01), Sorger et al.
patent: 4679015 (1987-07-01), Murakami et al.
patent: 4743874 (1988-05-01), Kinoshita et al.
20th Conf. on Magnetism and Magnetic Materials, Owens et al., p. 497, lines 3-9, 39-41, FIG. 2.
1985 IEEE MTT-5 International Microwave Symposium--Digest, St. Louis, Mo., Jun. 4-6, 1985, pp. 285-288, IEEE New York, U.S.; Y. Murakami et al., p. 285, lines 24-39, FIG. 1, "A bandpass filter using YIG . . . ".
Radio-Fernsehen Elektronik, vol. 31, No. 10, Oct. 1982, p. 661--Berlin-Est. DD: YIG--Bauerlemente Unded--Funktionsgruppen, FIG. 4.
Bell Systems Tech. Journal, vol. 48, No. 5, May/Jun. 1969, pp. 1421-1444, M. V. Schneider, "Microstrip liens . . . ", p. 1424, lines 7-25, FIG. 1e, 1f, 1g.
Murakami Yoshikazu
Niikura Kanako
Ogihara Takahiro
Okamoto Tsutomu
Ham Seung
LaRoche Eugene R.
Sony Corporation
LandOfFree
Ferromagnetic resonance device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ferromagnetic resonance device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferromagnetic resonance device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-937281