S
Sang H. Choi
Researcher at Langley Research Center
Publications - 102
Citations - 830
Sang H. Choi is an academic researcher from Langley Research Center. The author has contributed to research in topics: Rectenna & Thermoelectric materials. The author has an hindex of 13, co-authored 102 publications receiving 749 citations.
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Cobalt oxide hollow nanoparticles derived by bio-templating
TL;DR: The first fabrication of hollow cobalt oxide nanoparticles produced by a protein-regulated site-specific reconstitution process in aqueous solution is presented and the metal growth mechanism in the ferritin interior is described.
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Transpiration Cooling Experiment for Scramjet Engine Combustion Chamber by High Heat Fluxes
TL;DR: A transpiration cooling experiment using an optical heating method that provided a heat flux as high as 234 W/cm 2 on the surface of specimen for a scramjet engine was performed as discussed by the authors.
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Microwave power for smart material actuators
TL;DR: In this paper, a 6 × 6 array patch rectenna was designed to theoretically generate voltages up to 540 V, but practically it has generated voltages in the range between 200 and 300 V. Test results show that more than 200 V of output were obtained from a 6×6 array at a far-field exposure (1.8 m away) with an X-band input power of 18 W.
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Performance characterization of flexible dipole rectennas for smart actuator use
TL;DR: In this article, various flexible dipole rectenna arrays and arrays were designed, fabricated and characterized over a frequency range of 9-12 GHz with 20-W and 200-W amplifiers through laboratory testing.
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Microwave power transmission using a flexible rectenna for microwave-powered aerial vehicles
TL;DR: In this paper, the authors have developed a wireless power transmission technology using a flexible rectenna system and implemented it for a microwave-powered aerial vehicle (MPAV) system.