DESIGN, FABRICATION, AND MEASUREMENT OF GENETIC PROGRAMMING DEVELOPED BROADBAND RF METAMATERIAL ABSORBERS
Date
2024
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Abstract
Metamaterial absorbers are devices and surfaces specially designed to absorb electromagneticenergy. These absorbers are of critical interest for many applications, such as radar camouflage, EMI
shielding, and antenna design. However, it is challenging to design compact absorbers with
broadband performances. Experimental verification is even more difficult with current
manufacturing processes. In this work, a hybrid genetic programming (HGP) approach has been
used to develop several uniquely patterned broadband metamaterial absorbers with absorption
characteristics spanning from 2-18GHz. A simple and efficient fabrication method has been
developed for cutting unique and highly detailed patterns from a carbon-loaded polyethylene
conductive film. This has then allowed for the experimental verification of several new HGP-
developed designs. The metamaterials have features including broadband performance, incident
angle stability up to 60°, polarization independence, compact 3-layer design, readily available
materials, and a simple fabrication process. This thesis covers the design, fabrication, and
experimental verification process for three unique conductive film-based designs. These designs are
found to agree well with simulation and demonstrate the effectiveness of the HGP approach and
unique metamaterials.
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Electromagnetics, Metamaterials
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23 pages
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