Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Ohmic loss"”.
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MIMO Communication Capacity: Antenna Coupling and Precoding for Incoherent Detection
… impact of superdirectivity by introducing finite ohmic loss into the capacity expressions. Results show that even a small amount of ohmic loss significantly affects the achievable system capacity and suppresses superdirective solutions. This formulation allows a more detailed examination of the …
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Tiny Piezoelectric Energy-Harvesting CMOS Charger
… energy from vibration. Moreover, the charger is lossy, and imposes limits on the operation. The objective of this research is to study, evaluate, design, build, test, and assess energy-harvesting CMOS battery chargers that draw and output the most power possible from ambient motion with …
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Experimental study of a high efficiency gyrotron oscillator
… and detailed experimental results of a new low ohmic loss cavity, a four-mirror internal mode converter and a single-stage depressed collector. The low ohmic loss TE22,6 cavity, designated "V-2005", was designed using the code MAGY to have a Q factor of 830, which would be suitable for CW …
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Development of active microwave thermography for structural health monitoring
… of the interaction of microwave energy with lossy dielectric materials which results in dissipated microwave energy and a subsequent increase in temperature. Induction heating is a result of induced surface current on conductive materials with finite conductivity under microwave illumination …
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Modeling of conductor surface roughness effect
… current flow and results in a higher than usual ohmic loss. This, in turn, impacts the performance of a variety of high-frequency interconnect, waveguide, and signal processing passive devices. It is, thus, very important to account for the impact of conductor surface roughness on the modeling …
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High-efficiency Waveguide Tunable Leaky-wave Antennas and Phase-shifters
… to the proposed design results in reducing the Ohmic loss in the gap of the split-block antenna and maximizing its efficiency. The antenna has a much smaller width compared to its serpentine waveguide counterparts which makes it possible to place several of them side-by-side to narrow the beam …
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Multi-dimensional modeling of transient transport phenomena in molten carbonate fuel cells
… a higher reaction rate, but may lead to larger ohmic loss which is not desirable. The reversible heat generation and consumption mechanisms of the cathode and anode are dominant in the first 10 s while the heat conduction from the solid materials to the gas phase is not considerable. The …