Broadband Switching Nonlinear Metamaterial
| Autor: | Sun K. Hong, Scott M. Rudolph, Kenneth L. Morgan, Walter S. Wall |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Permittivity Metamaterial cloaking Materials science business.industry Nonlinear metamaterials Physics::Optics Metamaterial Physics::Classical Physics law.invention Split-ring resonator Amplitude Optics law Broadband Metamaterial absorber Optoelectronics Electrical and Electronic Engineering business Waveguide Transformation optics Voltage Metamaterial antenna |
| Zdroj: | IEEE Antennas and Wireless Propagation Letters. 13:427-430 |
| ISSN: | 1548-5757 1536-1225 |
| DOI: | 10.1109/lawp.2014.2308989 |
| Popis: | In this letter, we present a nonlinear metamaterial capable of transitioning between a broadband reflective and broadband nonreflective state depending on the incident power level. Below the activation voltage, broadband reflectivity is created by forbidding propagation through the metamaterial as a result of the effective permittivity and permeability having different signs. Above the activation voltage, reflection is suppressed by matching the effective permittivity and permeability. Full-wave simulations are performed to analyze the electromagnetic characteristics of the structure, with experimental results presented at S-band frequencies in a WR-284 waveguide. These measurements demonstrate a 10 dB reduction in reflected amplitude over an 18% bandwidth, a 3-dB reduction over a greater than 30% bandwidth, and a maximum difference in reflection of nearly 42 dB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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