Flexible Electronics for RF and mmWave Applications
Author(s)
Sivapurapu, Sridhar
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Abstract
This thesis discusses the requirements and considerations for the design, fabrication, measurement, and implementation of flexible electronics for RF and mmWave applications. As a first step, this thesis focuses on completing model to hardware correlation for different components such as microstrip transmission lines and planar inductors while these components undergo bending. As the next step, a lower loss stack-up for high frequency flexible applications is developed. Ultra-thin flexible glass is chosen as the substrate material and characterized electrically (dielectric constant and dielectric loss tangent) up to 110 GHz and mechanically (determining when mechanical failure occurs while undergoing bending). After completing the ultra-thin, flexible glass characterization, a patch antenna array has been designed, fabricated, and measured for 24 GHz Automotive Doppler Radar. Both flat and bending measurements are performed for S Parameters and radiation pattern measurements to determine the impact of the bending on the response. For S Parameters, minimal change was found while the antenna array underwent bending, but noticeable change in the radiation pattern was measured. After completing the antenna array measurements, an Automotive Doppler Radar was designed and fabricated onto ultra-thin glass. This radar includes a Quadrature Hybrid coupler and a passive mixer to implement the doppler radar. Finally, the thesis also considers the design of a 77 GHz antenna array for automotive applications.
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Date
2022-01-18
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Text
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Dissertation