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YIG Oscillators: Is a Planar Geometry Better?

CARTER,, RONALD L and OWENS,, JOHN M. and De, Dilip Kumar (1982) YIG Oscillators: Is a Planar Geometry Better? IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 32 (12). pp. 1671-1674.

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Abstract

Two yttrium-iron-garnet (YIG) oscillator technologies are comparerk the more mature YIG sphere oscillator technology which is based on the uniform (resonant) precession of the electron spins in a smafl sphere of YIG, and the new planar YIG technology which utilizes the propagation of magnetostatic waves in an epitaxiaf film of YIG. The YIG sphere technology has been used for microwave oscillators for more than 25 years, but has two significant areas of difficulty in applications the alignment of the YIG sphere in the magnetic bias field coupfbrg cavity requires great precision and the gain element requires a negative resistance element to sustain oscillation. The MSW technology is much newer and less well understood, but the resonator elements are fabricated using a 50- pm line width planar technology making it assappealhg candidate. Both technologies are reviewed herein with regard to resonant element theory, temperature, and noise characteristics. New data and theory are presented on MSW resonator optimization.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 12 Apr 2015 21:24
Last Modified: 12 Apr 2015 21:24
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/4909

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