NDLI: Low-Loss Magnetically Tunable Bandpass Filters With YIG Films

Content Provider	IEEE Xplore Digital Library
Author	Guo-Min Yang Jing Wu Jing Lou Ming Liu Sun, N.X.
Copyright Year	1965
Abstract	A magnetically tunable bandpass filter (BPF) with a yttrium iron garnet (YIG) film deposited on the gadolinium gallium garnet (GGG) substrate have been designed, fabricated, and characterized. Single-crystal YIG films at their ferromagnetic resonance were adopted as the resonator, which was coupled to a T-shaped microstrip coupling structure to form a bandpass filter design. The operating frequency of the BPF can be tuned via a bias magnetic field, and a large tunability of the operation frequency of 190-840 MHz with relatively small bias fields of 50-250 Oe, together with a low insertion loss of 2 dB. This is equivalent to 12%-54% of the central frequency of the bandpass filter. Double-sided YIG films were used to enhance the filter bandwidth, and a maximum 3-dB bandwidth of 57 MHz was realized with the bias field of 155 Oe. These demonstrated magnetically tunable bandpass filters are very compact and energy efficient, which could have many applications in radio frequency (RF) front and other microwave circuits.
Sponsorship	IEEE Magnetics Society
Starting Page	5063
Ending Page	5068
Page Count	6
File Size	852648
File Format	PDF
ISSN	00189464
Volume Number	49
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	yttrium iron garnet (YIG)–gadolinium gallium garnet (YIG-GGG) Ferromagnetic resonance magnetically tunable bandpass filters
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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