Artificial composite materials consisting of nonlinearly loaded electrically small antennas: operational-amplifier-b ased circuits with applications to smart skins

Fabrice Auzanneau, Richard W Ziolkowski

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Several new artificial nonlinear composite materials are introduced in this paper. They consist of electric molecules constructed with nonlinearly loaded electrically small dipole antennas. Their behaviors are studied with an augmented finitedifference time-domain (FDTD) simulator. The loads are based upon the use of multiple diodes and ideal operational amplifiers. The resulting composite materials are shown to have nonlinear electromagnetic properties including the ability to create any desired set of harmonics and subharmonics from an input wave having a single fixed frequency. Curve shaping circuits are introduced, simulated, and used to design materials that produce output signals of specified forms. Because the operating points of these curve shapers are adjustable, they could be modified in real time. The resulting smart materials could be designed in the microwave region to produce any specified response to a recognized input signal.

Original languageEnglish (US)
Pages (from-to)1330-1339
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume47
Issue number8
DOIs
StatePublished - 1999

Fingerprint

Operational amplifiers
Skin
Antennas
Dipole antennas
Intelligent materials
Networks (circuits)
Composite materials
Diodes
Simulators
Microwaves
Molecules

Keywords

  • Electromagnetic propagation in nonlinear media
  • Electromagnetic scattering by nonlinear media
  • Nonhomogeneous media

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

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abstract = "Several new artificial nonlinear composite materials are introduced in this paper. They consist of electric molecules constructed with nonlinearly loaded electrically small dipole antennas. Their behaviors are studied with an augmented finitedifference time-domain (FDTD) simulator. The loads are based upon the use of multiple diodes and ideal operational amplifiers. The resulting composite materials are shown to have nonlinear electromagnetic properties including the ability to create any desired set of harmonics and subharmonics from an input wave having a single fixed frequency. Curve shaping circuits are introduced, simulated, and used to design materials that produce output signals of specified forms. Because the operating points of these curve shapers are adjustable, they could be modified in real time. The resulting smart materials could be designed in the microwave region to produce any specified response to a recognized input signal.",
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