NDLI: Composite Metamaterial and Metasurface Integrated With Non-Foster Active Circuit Elements: A Bandwidth-Enhancement Investigation

Content Provider	IEEE Xplore Digital Library
Author	Saadat, S. Adnan, M. Mosallaei, H. Afshari, E.
Copyright Year	1963
Abstract	A metamaterial is designed and integrated with non-Foster active elements to investigate wideband negative permeability characteristics. A composite structure made of periodic resonant loops terminated with capacitors is first developed, and demonstrated that the negative permeability can be achieved near the resonance where the material is highly dispersive and the response is narrowband. To overcome this limitation, a negative active inductor is designed and utilized to compensate for the frequency dispersion of the loop and to achieve wideband negative permeability. Transmission-line circuit model analogy is employed to theoretically investigate the behavior of the composite configuration and predict its physical parameters, followed by a full-wave analysis based on the CST Studio Suite to numerically validate the results. A simple periodic metasurface structure is also implemented to demonstrate the ability of negative active elements (e.g., negative C and negative L) to obtain wideband characteristics. As a result, considerable bandwidth enhancement for both composite metamaterial and metasurface integrated with negative active elements is achieved compared to traditional designs. The basic principle of non-Foster elements is discussed and Linvill's topology is used throughout the paper to obtain the negative impedance. The stability of the entire system is then investigated using the eigenvalue technique and, finally, some related issues to the stability of the non-Foster elements are discussed.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1210
Ending Page	1218
Page Count	9
File Size	1353278
File Format	PDF
ISSN	0018926X
Volume Number	61
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Metamaterials Integrated circuit modeling Bandwidth Resonant frequency Inductors Permeability non-Foster element Composite material metamaterial negative permeability
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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