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Petz, Charlene (author)
As 5G is rapidly growing, wireless communication systems require wideband, compact and highly efficient power amplifier modules (PA) to drive the base station antenna arrays. Doherty PAs are implemented in most base stations. The final stage in these power amplifier modules has high supply voltages (28-50 V) to generate a...
master thesis 2023
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El Boustani, Ossama (author)
This work describes a fully digital transmitter (DTX) for 5G mMIMO base stations that combines the strengths of high-speed digital CMOS with the high-power capabilities of a Monolithic Microwave Integrated Circuit (MMIC) high-voltage technology. This technology platform offers high integration and scalability for implementing Radio Frequency...
master thesis 2023
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Tariq Alaa Mohamed Aziz Ibrahim, Tariq (author)
Wireless data traffic is projected to steadily increase in the near future, necessitating the demand for transceivers with higher linearity and efficiency. Digital power amplifiers have the potential to achieve these higher efficiency demands while digital pre-distortion can be used to improve their linearity. Digital pre-distortion requires a...
master thesis 2022
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van der Kamp, Pieter (author)
N-path filters promise to miniaturize RF receivers by replacing various fixed off-chip filters with a single programmable on-chip filter. This research investigates some of the issues of receivers with N-path filters under strong blocker conditions: reciprocal mixing and inherent nonlinearity. First, a technique for reciprocal mixing...
master thesis 2022
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Hardeman, Gilbert (author)
This work presents a highly linear quadrature down-converter topology intended for the linearization of digital Transmitters(DTX). By integrating it with a DTX, a fully integrated on-chip output-signal correction loop comes closer to its realization. The proposed down conversion architecture can measure the errors introduced by the non-linearity...
master thesis 2021
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Bagdonas, Faustas (author)
Many applications require wide bandwidth transmitters, but unfortunately, they usually have way less than 50% average drain efficiency for their modulated signals. This low efficiency is a significant drawback in all wireless applications, both for battery power devices and base stations. The Doherty radio frequency (RF) power amplifier...
master thesis 2021
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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, Anil Kumar (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, Jun (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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Bruinsma, Quinten (author)
The ever increasing demand for faster data rates combined with the need for higher levels of integration, while keeping the production and operation cost to a minimum leads to the requirement of an efficient high bandwidth digital transmitter architecture. With the shortcomings of both polar and cartesian architectures, a new architecture is...
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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Bootsman, R.J. (author)
Recent years have seen an exponential growth in required wireless data capacity. This exponential growth is expected to continue, while it is unsustainable if the power consumption associated with it will grow at the same rate. This calls for better power efficiency, which can usually be found in polar power amplifier architectures. This thesis...
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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