Searched for: contributor:"De Vreede, L.C.N. (mentor)"
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Hoogelander, Martijn (author)
This thesis investigates the performance limits and design challenges of two current-mode front-end concepts that target WiFi and mm-wave 5G applications, respectively. The first concept is a power amplifier (PA), which operates at 2.4GHz and is driven by a direct-digital RF modulator (DDRM). A design for the PA, which also includes a parallel...
master thesis 2021
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Kumaran, A.K. (author)
CMOS technology is one of the feasible solutions to meet the world’s growing demand for high data rates because it offers the prospect of SoC at a low cost. But, the PA forms the major bottleneck in making SoC because the PAs in high data rate wireless communication systems have the requirement of high-efficiency and good linearity even at...
master thesis 2020
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Feng, Y.J. (author)
This thesis presents the development of circuits and systems for fast wireline transceiver links that will enable a move towards highly integrable RF digital-to-analog converters. A new perspective on the analysis of bit error rates in wireline links leads to the PAM spectral design space chart: a novel, visual system design analysis tool for...
master thesis 2020
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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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Polushkin, M. (author)
Over the past two decades, the use of wireless communication has increased dramatically, reaching a total global data usage of several exabytes per month, as of 2015. The transmitters (TX) used in wireless communication systems typically operate at efficiencies in the order of 20–30%, which puts a large strain both on the wireless network...
master thesis 2017
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D'Avino, M. (author)
master thesis 2016
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Chen, L. (author)
master thesis 2016
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Zhou, L. (author)
master thesis 2016
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Van der Meulen, J.M.M. (author)
SiGe bipolar amplifiers are getting more competitive in terms of noise figure to GaAs amplifiers. However, the linearity of these amplifiers is still limited in view of these GaAs implementations. In order to address and overcome these linearity limitations, this thesis report will start demonstrating that the linearity of SiGe bipolar...
master thesis 2015
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Venter, R.G. (author)
Semiconductor power devices have a growing popularity in industrial, scientific and medical (ISM) band applications, such as microwave-heating, drying and plasma generation. A distinguishable property of these applications is the relentless pursuit of reliability, ruggedness, or the ability to withstand a mismatched loading condition without...
master thesis 2014
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Venter, R.G. (author)
Semiconductor power devices have a growing popularity in industrial, scientific and medical (ISM) band applications, such as microwave-heating, drying and plasma generation. A distinguishable property of these applications is the relentless pursuit of reliability, ruggedness, or the ability to withstand a mismatched loading condition without...
master thesis 2014
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He, J. (author)
Currently the Doherty Power Amplifier (DPA) is replacing the traditional Class B amplifier in base-station and broadcast applications, as such becoming the preferred choice of industry due to its simplicity and high efficiency performance. In spite of its success, so far practical DPA implementations can provide only a very limited RF bandwidth,...
master thesis 2013
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Li, J. (author)
This thesis aims for high power wideband amplifiers suitable for base station instrumentation purposes. A power combing topology is introduced, not only to achieve high power but also good input and output matching. Two kinds of broadband 3-dB quadrature couplers, which are important components in the power combing topology, are designed and...
master thesis 2011
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Todi, R. (author)
Wireless communication has encountered a tremendous growth over the past few decades. The increased plurality in communication standards, characterized by the use of different operating frequencies and data rates, has translated into very tough specifications for the broadcasting base station power amplifier, in terms of efficiency, bandwidth...
master thesis 2011
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Ene, S.I. (author)
Communication systems evolve day after day at a very fast pace. People not only have high expectations in regard of the conversation quality, but they also need more data download speeds and better coverage. The industry tries to come and fill in this expectation by developing state-of-the art systems that are cost-effective and that ensure good...
master thesis 2011
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Shi, K. (author)
With the rapid growth of wireless communication systems, there is more and more demand for radio frequency power amplifiers (RFPAs) in base stations to be power-efficient so as to reduce the cooling and electrical power cost. Besides the efficient requirement, wide-band working frequency and compact PCB size are also attractive for cutting more...
master thesis 2010
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Wu, B. (author)
As the first stage of the amplifier chain aiming for the base station applications, a highly linear low noise amplifier (LNA) dictates very high performance for optimum coverage with a best signal quality. In today’s commercial market, the GaAs enhancement-mode pHEMT based LNA is dominant. However, a SiGe-based LNA, due to its high integration,...
master thesis 2010
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Wu, B. (author)
As the first stage of the amplifier chain aiming for the base station applications, a highly linear low noise amplifier (LNA) dictates very high performance for optimum coverage with a best signal quality. In today’s commercial market, the GaAs enhancement-mode pHEMT based LNA is dominant. However, a SiGe-based LNA, due to its high integration,...
master thesis 2010
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Zhang, R. (author)
This research work aims to gain understanding of the power amplifier (PA) operating as a linear PA under low power drive conditions and as a switch-mode PA in high power drive conditions both with the same Class-E load. Two approaches were taken here. Firstly, an analytical approach was developed to investigate the switching operation of...
master thesis 2010
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Zhang, T. (author)
Conventional RF power amplifiers are normally designed for peak efficiency at maximum output power. However, for WCDMA application, the power amplifier often operates at 6-8 dB power back-off. Consequently, when the power is backed-off from its peak point, the efficiency of conventional power amplifier drops sharply. The envelope elimination and...
master thesis 2009
Searched for: contributor:"De Vreede, L.C.N. (mentor)"
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