Searched for: subject%3A%22efficiency%255C+enhancement%22
(1 - 9 of 9)
document
van Schie, Martin (author)
Aviation has a significant contribution to climate change, which must be decreased. The A321 APPU could offer a substantial improvement, by introducing a hydrogen-powered Auxiliary Power and Propulsion Unit (APPU). This turboshaft engine is located in the tail cone and powers a boundary layer ingestion propulsor, taking over 10% of the thrust....
master thesis 2024
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Kooij, Roeland (author)
As the world is getting used to 5G technology, 6G is already on the horizon. With the ultimate goal of very low latency communication and Tbps data rates, 6G supports new wireless technologies such as virtual and augmented reality and autonomous driving. In this new generation of wireless communication, high frequencies up to 100 GHz are used...
master thesis 2023
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Beikmirza, M.R. (author)
The demand for faster mobile access and higher data throughput drives the evolution of wireless cellular communication, requiring larger modulation bandwidths and higher-order modulations and necessitating more efficient and flexible transmitter systems.<br/>Simultaneously, the advancements in nano-scale CMOS technologies have made transistors...
doctoral thesis 2023
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Zhou, Yuekuan (author), Liu, Zhengxuan (author)
Transition towards a carbon-neutral district energy community calls for carbon elimination and offsetting strategies, and phase change materials (PCMs) with substantial potential latent energy density can contribute significantly to carbon neutrality through both carbon-positive (like PCM-based thermal control in solar PVs) and carbon...
review 2023
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Shen, Y. (author)
This thesis focuses on digital-intensive up-converters for sub-6GHz wireless communication. Nowadays, wireless cellular communication is entering its 5th generation (5G), driven by the demand for faster mobile access and higher data throughput. 5G utilizes larger modulation bandwidths, higher-order modulations, and (many) more transmitters and...
doctoral thesis 2021
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Shah, Aditya Mehul (author)
The use of clean energy sources for meeting the world’s energy requirements is increasing at an exponential rate, thus opening up new areas for research and development. The second generation of photovoltaics, especially flexible thin-film solar cells, are increasingly being used over the first generation crystalline silicon technologies due to...
master thesis 2021
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Beikmirza, M.R. (author), Shen, Y. (author), de Vreede, L.C.N. (author), Alavi, S.M. (author)
We present a wideband, 12-bit four-way Doherty Cartesian digital transmitter (DTX) featuring an innovative 50%-LO signed I/Q interleaved up-conversion technique that enables close to perfect orthogonal I/Q summation. The DTX incorporates a compact four-way lumped-element Doherty power combining network to enhance its average efficiency at...
journal article 2021
document
Giri, Amitava (author)
In 5G transmitters, high efficiency, high linearity, and compatibility with MIMO and beamforming techniques are of utmost importance. Typically, enhancement techniques like supply modulation or load modulation are used when dealing with envelope modulated communication signals, which increasingly have high peak-to-average-power ratios (PAPR)....
master thesis 2018
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Feng, Jun (author), Louwerse, Alexander (author)
The objective of the bachelor graduation project detailed in this thesis is the development of a system suited for testing radio frequency (RF) power amplifiers (PAs). This PA test system is in particular set up for testing two-transistor interpolating-supply amplifiers.<br/>Interpolating-supply PAs are efficiency-enhanced by employing multiple...
bachelor thesis 2017
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