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Your search keyword '"Scarborough, Clinton P."' showing total 26 results
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26 results on '"Scarborough, Clinton P."'

2. A Low Cost and Highly Efficient Metamaterial Reflector Antenna

Author

Gregory, Micah D., primary, Bossard, Jeremy A., additional, Morgan, Zachary C. P. O., additional, Cicero, Cooper S., additional, Easum, John A., additional, Binion, John D., additional, Zhu, Danny Z., additional, Scarborough, Clinton P., additional, Werner, Pingjuan L., additional, Werner, Douglas H., additional, Griffiths, Scott, additional, Ketner, Matthew, additional, and Pompeii, Joshua, additional

Published
2018
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6. Metamaterials for high power reflectarray design

Author

Gregory, Micah D., primary, Bossard, Jeremy A., additional, Morgan, Zachary C. P. O., additional, Cicero, Cooper S., additional, Easum, John A., additional, Binion, John D., additional, Zhu, Danny Z., additional, Scarborough, Clinton P., additional, Werner, Pingjuan L., additional, Werner, Douglas H., additional, Griffiths, Scott, additional, and Ketner, Matthew, additional

Published
2016
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11. Metasurface with Reconfigurable Reflection Phase for High-Power Microwave Applications

Author

PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Morgan, Kenneth L, Scarborough, Clinton P, Gregory, Micah D, Werner, Douglas H, Werner, Ping L, Griffiths, Scott F, PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Morgan, Kenneth L, Scarborough, Clinton P, Gregory, Micah D, Werner, Douglas H, Werner, Ping L, and Griffiths, Scott F

Abstract

We propose a metasurface with reconfigurable reflection phase that can be utilized in high power microwave (HPM) applications. The structure relies on capacitor networks controlled by appropriately biased PIN diodes. Simulations reveal that the metasurface has a reflection phase tuning range of approximately 300 degrees with an associated change in capacitance of 2.7 pF.

Published
2014

12. High-Power Considerations in Metamaterial Antennas

Author

PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Bossard, Jeremy A, Scarborough, Clinton P, Wu, Qi, Werner, Douglas H, Werner, Ping L, Griffiths, Scott F, PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Bossard, Jeremy A, Scarborough, Clinton P, Wu, Qi, Werner, Douglas H, Werner, Ping L, and Griffiths, Scott F

Abstract

While many studies have been conducted on metamaterials at microwave frequencies, comparatively few have examined their use in high-power applications. Here, we perform a general study of metamaterial geometries to identify configurations that are well-suited for utilization in high-power environments. We further develop a genetic algorithm optimization scheme for synthesizing pixelized geometries with artificial magnetic conducting (AMC) properties and reduced maximum field enhancement factor (MFEF).

Published
2014

13. Metasurface with Reconfigurable Reflection Phase for High-Power Microwave Applications (Briefing Charts)

Author

PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Morgan, Kenneth L, Scarborough, Clinton P, Gregory, Micah D, Werner, Ping L Werner, Douglas H, Griffiths, Scott F, PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF ELECTRICAL ENGINEERING, Morgan, Kenneth L, Scarborough, Clinton P, Gregory, Micah D, Werner, Ping L Werner, Douglas H, and Griffiths, Scott F

Abstract

Examples that demonstrate theoretical methods for extending the operating power levels of metasurface reflectarrays have been given. The proposed designs provide the same utility that has been previously demonstrated, however are capable of operating at much higher power levels. Future Work: Investigate additional electrically-tunable alternatives. Demonstrate mechanically tunable reflect-array metasurface. Fabrication and testing of a static prototype with predetermined super cell heights to form gradient phase distribution producing a desired reflected beam. Investigation of mechanical systems capable of reconfiguring ground plane without significant performance impacts., The original document contains color images. Contains briefing charts only.

Published
2014

25. A Ku-Band Dual Polarization Hybrid-Mode Horn Antenna Enabled by Printed-Circuit-Board Metasurfaces.

Author

Wu, Qi, Scarborough, Clinton P., Martin, Bonnie G., Shaw, Robert K., Werner, Douglas H., Lier, Erik, and Wang, Xiande

Subjects
*HORN antennas, *APERTURE antennas, *RADIO antennas, *PRINTED circuits, *GENETIC algorithms
Abstract

Metamaterials with properly engineered surface properties have been recently proposed for application in the design of broadband hybrid-mode horn antennas, such as soft and hard horns. In this paper, we present the design, fabrication, and measured results of a square dual-polarization horn antenna with thin metasurfaces lining the four walls, demonstrating broadband, negligible-loss hybrid-mode operation. By employing a powerful genetic-algorithm (GA) design optimization technique, we have dispersion-engineered low-index metaliners whose surface impedances satisfy the balanced hybrid condition across the Ku-band. The optimized metaliners were synthesized based on conventional printed-circuit board technology, leading to a lightweight and low-cost construction. To improve the cross-polarization response, a simple dielectric plug was placed in the throat of the horn to perform effective mode conversion. Measurements showed that the fabricated horn antenna prototype provided low sidelobes, low cross-polarization levels, and radiation patterns that are approximately independent of polarization. Excellent agreement was found between measured and simulated results across the entire band of operation. Both the far-field radiation patterns and the aperture field distributions confirm the hybrid-mode operation of the horn, validating the balanced metasurface design. This metamaterial-enabled antenna represents a low-cost alternative to other types of soft feed horns, such as corrugated horns. [ABSTRACT FROM PUBLISHER]

Published
2013
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