NDLI: High-frequency signal processing using ferromagnetic metals

Content Provider	IEEE Xplore Digital Library
Author	Kuanr, B. Harward, I.R. Marvin, D.L. Fal, T. Camley, R.E. Mills, D.L. Celinski, Z.
Copyright Year	1965
Abstract	We present results for tunable microwave band-stop and bandpass filters on a microstrip geometry. These structures, prepared by sputtering on GaAs substrates, are compatible in size and growth process with on-chip high-frequency electronics. For the notch filters, we observed power attenuation up to /spl sim/100 dB/cm and an insertion loss on the order of /spl sim/2-3 dB for both Permalloy- and Fe-based structures. The operational frequency ranges from 5 to 35 GHz for external fields below 5 kOe. We discuss methods to increase operational frequency and reduce device linewidth. Using these techniques we are able, for example, to obtain an operational frequency of 11GHz at zero applied field and to narrow the device linewidth from 3 GHz to 330 MHz. The operational frequency, which can be obtained from the ferromagnetic resonance condition, is set by material properties such as saturation magnetization M/sub s/, anisotropy fields, the gyromagnetic ratio, and the magnitude of an applied field H. Thus, by using different materials and external fields one can create devices which function over a wide range of frequencies.
Sponsorship	IEEE Magnetics Society
Starting Page	3538
Ending Page	3543
Page Count	6
File Size	326989
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal processing Frequency Band pass filters Magnetic materials Microstrip filters Geometry Sputtering Gallium arsenide Microwave filters Power filters microstrip Bandpass filter band-stop filter ferromagnetic resonance
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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