Mitigating Field Enhancement in Metasurfaces and Metamaterials for High-Power Microwave Applications

Jeremy A. Bossard, Clinton P. Scarborough, Qi Wu, Sawyer D. Campbell, Douglas H. Werner, Pingjuan L. Werner, Scott Griffiths, Matthew Ketner

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Metasurfaces and metamaterials have been explored extensively in recent years for their ability to enable a variety of innovative microwave devices. However, because their exotic properties often arise from resonant structures, the large field enhancements under high-power microwave illumination can lead to dielectric breakdown and damage to the device. In order to develop metasurfaces and metamaterials capable of being utilized in high-power microwave applications, this paper investigates techniques for reducing the maximum field enhancement factor (MFEF) in several types of structures from the literature. Starting with a simple Sievenpiper metasurface, this paper evaluates the dependence of MFEF on the structure design parameters. For more complex metasurface geometries, a genetic algorithm is demonstrated that can evolve structures that have minimal MFEF. In addition, negative-index and low-index metamaterials are evaluated for field enhancement. By optimizing for low loss and by operating in the resonance tails, metamaterials with low MFEF can be realized for high-power applications. To illustrate this, a quad-beam focusing metamaterial lens is presented with an MFEF less than 5 over the entire operating band.

Original languageEnglish (US)
Article number7728038
Pages (from-to)5309-5319
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Volume64
Issue number12
DOIs
StatePublished - Dec 2016

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Metamaterials
Microwaves
Microwave devices
Electric breakdown
Lenses
Lighting
Genetic algorithms
Geometry

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Bossard, Jeremy A. ; Scarborough, Clinton P. ; Wu, Qi ; Campbell, Sawyer D. ; Werner, Douglas H. ; Werner, Pingjuan L. ; Griffiths, Scott ; Ketner, Matthew. / Mitigating Field Enhancement in Metasurfaces and Metamaterials for High-Power Microwave Applications. In: IEEE Transactions on Antennas and Propagation. 2016 ; Vol. 64, No. 12. pp. 5309-5319.
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Mitigating Field Enhancement in Metasurfaces and Metamaterials for High-Power Microwave Applications. / Bossard, Jeremy A.; Scarborough, Clinton P.; Wu, Qi; Campbell, Sawyer D.; Werner, Douglas H.; Werner, Pingjuan L.; Griffiths, Scott; Ketner, Matthew.

In: IEEE Transactions on Antennas and Propagation, Vol. 64, No. 12, 7728038, 12.2016, p. 5309-5319.

Research output: Contribution to journalArticle

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