A Study of Electromagnetic Absorbers and Cloaks for the Reduction of Electromagnetic Scattering
- Author:
- Zhou, Yuda
- Published:
- [University Park, Pennsylvania] : Pennsylvania State University, 2015.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Mittra, Raj
Access Online
- etda.libraries.psu.edu , Connect to this object online.
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- Restrictions on Access:
- Open Access.
- Summary:
- Electromagnetic absorbers and scattering reduction techniques have long been investigated to discover better performing configurations and exploited to reduce Radar Cross-Section, act as sensors or reduce obstruction effects, throughout the electromagnetic spectrum ranging from UHF to terahertz frequencies, and even at infrared and optical wavelengths. This dissertation presents the research on a novel interpretation and design strategy for designing absorbers based on periodic structures and introduces an algorithm for determining the optimal material parameter for layered absorbers that are wrapped around real-world objects with structural perturbations from a planar surface, which traditional research focuses on almost exclusively. A brief history of absorbers was given and legacy configurations of absorbers were introduced in the first place. Secondly, novel Frequency Selective Surface (FSS)-based absorbers were proposed based on the interpretation of the reciprocity theorem for antenna systems. FSS-based absorbers and were incorporate into layered absorbers as composites for tailored absorption specifications. A comparison of performances was given to serve as a general rule of thumb to select optimal configuration for tailored specifications. This dissertation investigates a nascent solution to the scattering reduction problem, namely cloaking based on the physics of Transformation Optics (TO) and presents the real-world limitations of such solutions. This dissertation proposes an alternative algorithm for developing the optimal material parameter for a physical object in a real-world scenario. These explorations show the great promise and applicability of a comprehensive tailored absorber design strategy on a case-by-case basis.
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- Genre(s):
- Dissertation Note:
- Ph.D. Pennsylvania State University 2015.
- Reproduction Note:
- Microfilm (positive). 1 reel ; 35 mm. (University Microfilms 37-30713)
- Technical Details:
- The full text of the dissertation is available as an Adobe Acrobat .pdf file ; Adobe Acrobat Reader required to view the file.
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