Artificial composite materials consisting of nonlinearly loaded electrically small antennas: Operational-amplifier-based circuits with applications to smart skins

被引:15
作者
Auzanneau, F [1 ]
Ziolkowski, RW
机构
[1] CEA, CESTA, F-33114 Le Barp, France
[2] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ 85721 USA
关键词
electromagnetic propagation in nonlinear media; electromagnetic scattering by nonlinear media; nonhomogeneous media;
D O I
10.1109/8.791952
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 finite-difference 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.
引用
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页码:1330 / 1339
页数:10
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