Browsing by Author "Garrett, Benjamin Siddhartha"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Development of novel engineered materials for applications at microwave and infrared frequencies(University of Delaware, 2021) Garrett, Benjamin SiddharthaAdvances in materials research and manufacturing techniques are rapidly allowing more complex and interesting functional electromagnetic applications to be brought to fruition. Electromagnetic application development within all frequency bands ranging from infrared to radio and microwave are of particular interest to academic, scientific research institutes, industry, and governmental entities alike. In this dissertation, I describe the development of novel engineered materials and devices for infrared and radio and microwave spectral utilization. The first topic includes the design, fabrication and characterization of intricate micro-particles for infrared obscuration applications in the short wave, 1 µm to 3 µm, and long wave, 8 µm to 12 µm, bands. The second topic to be covered encompasses spectrally tunable RF devices, within the L, S, and C bands, 1 GHz to 10 GHz. Specifically, the design, fabrication and characterization of antennas utilizing tunable conductivity electrochromic polymers. These advancements described throughout this dissertation were made possible through robust simulation software, innovative fabrication techniques, and precise characterization methods. The marriage of all the individual elements throughout this dissertation improves upon current technologies and has the potential to spur even further progress in the field.Item Fabrication and characterization of layered spherical infrared filter particles(University of Delaware, 2017) Garrett, Benjamin SiddharthaThe ability to deposit layers of optical material on to micro-spherical particle substrates yields interesting and optimal electromagnetic mass extinction and other Mie theory scattering spectrum properties. Microsphere particle infrared filters, for use within the near-infrared/short-wavelength infrared (NIR/SWIR, λ=1µm to 3µm) and long-wavelength infrared (LWIR, λ=8µm to 12µm) spectral bands can be engineered by selecting materials with specific geometries and wavelength dependent complex refractive indices that tailor to desired mass extinction spectrum characteristics. ☐ Infrared filters that are lightweight and possess isotropic geometries, namely microspheres, are extremely valuable in many atmospheric science related applications. However, the applications certainly do not stop there; some other examples include use in diffusive blended inks and paints. Computationally, it has been shown that engineered particles possess superior wavelength specific mass extinction properties than many other infrared particle filters in existence currently. ☐ In this thesis, the method of fabrication of such layered microsphere particles will be detailed. Through renovation and modification of a radio frequency magnetron sputtering system layers were able to be deposited on to micro-spherical substrates with measurable layer thicknesses. Results of characterization will also be shown. Furthermore, future directions and other applications will also be discussed.