NDLI: Bulk Acoustic Wave-Mediated Multiferroic Antennas: Architecture and Performance Bound

Content Provider	IEEE Xplore Digital Library
Author	Zhi Yao Wang, Y.E. Keller, S. Carman, G.P.
Copyright Year	1963
Abstract	Time-varying magnetic flux can be induced from the dynamic mechanical strain of acoustic waves in multiferroic devices that are comprised of piezoelectric and magnetostrictive material. Such devices can be used to create electromagnetic radiation and to alleviate the platform effect associated with low-profile conformal antennas. In this paper, a bulk acoustic wave (BAW)-mediated multiferroic antenna structure is proposed. Its potential for efficient radiation of electromagnetic waves is evaluated by analytically deriving the lower bound of its radiation quality factor (Q factor). A one-dimensional (1-D) multiscale finite-difference time-domain (FDTD) technique is developed to predict the bilateral, dynamic coupling between the acoustic waves and electromagnetic waves. The simulation shows a decaying stress profile in the BAW resonator structure, which implies that the radiation of the electromagnetic waves acts as a damping load to the acoustic resonance. The simulated radiation Q factor matches well with the analytical derivations and the agreement validates both the operating principle of the proposed antenna and the FDTD algorithm developed. The study concludes that efficient antennas may be realized at GHz frequencies with thin film multiferroic material that has thicknesses of the order of 10^-5 wavelength.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3335
Ending Page	3344
Page Count	10
File Size	866489
File Format	PDF
ISSN	0018926X
Volume Number	63
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic flux Magnetostriction Antennas Strain Magnetoacoustic effects Stress platform effect bulk acoustic waves (BAW) conformal antennas film bulk acoustic resonators (FBAR) finite difference time domain method multiferroic antennas multiferroic material Bulk acoustic waves (BAW) film bulk acoustic resonators (FBARs) finite-difference time-domain (FDTD) method
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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