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Numerical Analysis Of Sandwiched Composite-Fss Structures, Rui Qiang, Ji Chen, Jingyu Huang, Marina Koledintseva, Richard E. Dubroff, James L. Drewniak, Fan Yang
Numerical Analysis Of Sandwiched Composite-Fss Structures, Rui Qiang, Ji Chen, Jingyu Huang, Marina Koledintseva, Richard E. Dubroff, James L. Drewniak, Fan Yang
Electrical and Computer Engineering Faculty Research & Creative Works
A numerical technique to analyze shielding effectiveness of sandwiched FSS-composite structures is proposed. This technique is based on using a dispersive FDTD method in conjuncture with a novel periodic boundary condition to model sandwiched FSS-composite elements. Results show that by inserting single or multilayered FSS elements into composite materials, better shielding effectiveness can be achieved.
Engineering Of Ferrite-Graphite Composite Media For Microwave Shields, Marina Koledintseva, Poorna Chander Ravva, James L. Drewniak, Alexander A. Kitaytsev, Andrey A. Shinkov
Engineering Of Ferrite-Graphite Composite Media For Microwave Shields, Marina Koledintseva, Poorna Chander Ravva, James L. Drewniak, Alexander A. Kitaytsev, Andrey A. Shinkov
Electrical and Computer Engineering Faculty Research & Creative Works
An electromagnetic shielding of objects using ferrite-graphite composites is considered. The analytical model, using the Maxwell Garnett formulation for multiphase mixtures, results of computations based on this model and plane-wave formulation, and some experimental results are represented.
Power Absorption Of Near Field Of Elementary Radiators In Proximity Of A Composite Layer, Marina Koledintseva, Poorna Chander Ravva, Jingyu Huang, James L. Drewniak, M. M. Sabirov, V. V. Bodrov, I. V. Sourkova, V. I. Sourkov
Power Absorption Of Near Field Of Elementary Radiators In Proximity Of A Composite Layer, Marina Koledintseva, Poorna Chander Ravva, Jingyu Huang, James L. Drewniak, M. M. Sabirov, V. V. Bodrov, I. V. Sourkova, V. I. Sourkov
Electrical and Computer Engineering Faculty Research & Creative Works
Near-field behavior of elementary electric and magnetic dipoles close to a plane layer (or layers) of engineered composite materials is analyzed using the rigorous analytical approach. Some results of computations are represented for composite media containing conductive inclusions. These composites provide shielding mainly due to absorption of electromagnetic energy. The effect of conductivity of inclusions and their geometry (through their aspect ratio) on the absorption and radiation efficiency of a radiator near composite layers is analyzed.
Electrostatic Active Radiation Shielding -- Revisited, John W. Wilson, R. K. Tripathi, R. C. Youngquist
Electrostatic Active Radiation Shielding -- Revisited, John W. Wilson, R. K. Tripathi, R. C. Youngquist
Mining Engineering Faculty Research & Creative Works
For the success of NASA's new vision for space exploration to Moon, Mars and beyond, exposures from the hazards of severe space radiation in deep space long duration missions is ''a must solve'' problem The payload penalty demands a very stringent requirement on the design of the spacecrafts for human deep space missions. Langley has developed state-of-the-art radiation protection and shielding technology for space missions. The exploration beyond low Earth orbit (LEO) to enable routine access to space require protection from the hazards of the accumulated exposures of space radiation, galactic cosmic rays (GCR) and solar particle events (SPE), and …