Department of Electrical and Electronic Engineering

 

Electrical and Electronic Engineering is an exciting and dynamic field. Electrical engineers are responsible for the generation, transfer and conversion of electrical power, while electronic engineers are concerned with the transfer of information using radio waves, the design of electronic circuits, the design of computer systems and the development of control systems such as aircraft autopilots. These sought-after engineers can look forward to a rewarding and respected career.

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Recent Submissions

  • Contemporary wind generators 

    Akuru, Udochukwu Bola; Kamper, Maarten J. (Energy Research Centre, 2015)
    It is believed that wind energy is growing at a very rapid rate, especially in the last few years. When compared with other sources of renewable energy in the energy portfolio, it becomes evident that the bulk is wind ...

  • An efficient beam steerable antenna array concept for airborne applications 

    Aliakbarian, Hadi; Van Der Westhuizen, Ewald; Wiid, Riaan; Volskiy, Vladimir; Wolhuter, Riaan; Vandenbosch, Guy A. E. (Radioengineering Society, 2014)
    Deployment of a satellite borne, steerable antenna array with higher directivity and gain in Low Earth Orbit makes sense to reduce ground station complexity and cost, while still maintaining a reasonable link budget. The ...

  • Clustering acoustic segments using multi- stage agglomerative hierarchical clustering 

    Lerato, Lerato; Niesler, Thomas (Public Library of Science, 2015)
    Agglomerative hierarchical clustering becomes infeasible when applied to large datasets due to its O(N2) storage requirements. We present a multi-stage agglomerative hierarchical clustering (MAHC) approach aimed at large ...

  • Fast parametric modeling of radio astronomy reflector antenna noise temperature 

    De Villiers, Dirk I. L. (Institute of Electrical and Electronics Engineers, 2016)
    This communication presents an approximate method to rapidly estimate the antenna noise temperature of a reflector antenna system as a function of the geometric parameters describing the reflector dishes. The initial ...

  • Constant radiation characteristics for log-periodic dipole array antennas 

    Lehmensiek, Robert; De Villiers, Dirk I. L. (Institute of Electrical and Electronics Engineers, 2014)
    Given the correct terminal voltages on each element of a log-periodic dipole array constant radiation characteristics can be achieved for an omni-directional radiation pattern. In this communication it is shown that this ...

  • Parametric modeling of radiation patterns and scattering parameters of antennas 

    Mutonkole, Ngoy; Samuel, Elizabeth Rita; De Villiers, Dirk I. L.; Dhaene, Tom (Institute of Electrical and Electronics Engineers, 2016)
    This paper describes a data-driven method to model the radiation patterns (over a large angular region) and scattering parameters of antennas as a function of the geometry of the antenna. The radiation pattern model consists ...

  • Modeling of the radiation pattern of a pair of thin circular-arc dipoles over an infinite ground plane 

    De Villiers, Dirk I. L.; Lehmensiek, Robert (Institute of Electrical and Electronics Engineers, 2013)
    This communication presents a model of the radiation pattern of two circular-arc dipoles above an infinite perfectly electrically conducting ground plane. A Fourier expansion is used to describe the currents on the wires, ...

  • Rapid calculation of antenna noise temperature in offset Gregorian reflector systems 

    De Villiers, Dirk I. L.; Lehmensiek, Robert (Institute of Electrical and Electronics Engineers, 2015)
    Antenna noise temperature calculations of reflector systems is often a slow process and makes direct optimization of the sensitivity of these systems a difficult and time consuming task. This paper presents an improvement ...

  • Waffle-iron filters with oblique boss patterns 

    Stander, T; Meyer, P; Van der Walt, P. W.; Steyn, W. (IEEE, 2012-09)
    A waffle-iron filter with an oblique boss pattern is proposed. A circuit model based synthesis method is developed to achieve control over the in-band reflection response. For equivalent filter orders, the boss pattern is ...

  • Etched ring absorbing waveguide filter based on a slotted waveguide antenna response 

    Stander, Tinus; Meyer, Petrie (Wiley, 2008-04)
    A cascade of resistively loaded etched rings in waveguide is proposed to act as the load in a balanced FMCW Reflected Power Canceller topology using a slotted waveguide array antenna. A synthesis technique using derived ...

  • Optimisation of a residential energy system with an embedded PV source 

    Nieuwoudt, Tielman (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The economic viability of PhotoVoltaic (PV) systems for the residential sector remains one of the greatest barriers to PV adoption. Economic viability of PV systems can be expressed in terms of a wide ...

  • Training neural word embeddings for transfer learning and translation 

    Gouws, Stephan (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: In contrast to only a decade ago, it is now easy to collect large text corpora from theWeb on any topic imaginable. However, in order for information processing systems to perform a useful task, such as ...

  • Smart material actuator for trailing edge thickening 

    Botha, Theuns (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The goal of the research project is to provide the conceptual, high level and subsystem level design of an actuation system that would achieve a shape change at the trailing edge of the rudder of a next ...

  • Ride comfort in commercial aircraft during formation flight using conventional flight control 

    Trollip, Evert Frederick (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Global market forecasts and rapid air transport growth are making the aeronautical industry become aware of the necessity to develop high capacity long-range and fuel-effi cient aircraft while maintaining ...

  • Improving visual speech synthesis using Decision Tree Models 

    Rademan, Christiaan Frans (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Visual speech synthesis is essential for believable virtual character interaction. Traditionally, animation artists recreate the oral motions expected from speech utterances. In response, we present ...

  • Magnetic field visualization for superconducting circuits 

    Van Staden, Ruben (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Ambient magnetic fields, trapped flux and fields generated by bias and ground return currents affect superconducting electronic circuits negatively. Analysis of current distribution in bias lines and in ...

  • A Signal-Based Model of Teleology in Tonal Music 

    Brand, Mark Andre (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The operationalisation of music’s affective agency is an open problem. This thesis notes a long tradition of associating that agency with goal-directed dynamics in the music, but also that those dynamical ...

  • SQUID geomagnetic signal analysis and modelling of Schumann Resonances in the earth-ionosphere cavity 

    Kwisanga, Christian (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Due to its extreme sensitivity to magnetic flux, vast dynamic range and wide bandwidth, the Superconductive Quantum Interference Device (SQUID) is at the frontier of all existing magnetic field sensors. ...

  • The application of Probabilistic Graphical Models to Raptor codes over Binary Input Memoryless Symmetric Channel models 

    Singels, Rian (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Raptor codes are Forward Error Correction (FEC) codes that fall under the class of Fountain codes. This class of code can reach data-transmission rates close to the capacity of the Binary Erasure Channels ...

  • Calibration of large Rogowski coils 

    Combrink, Stephanus Lucas (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The Square Kilometre Array aims to be the world’s largest radio telescope. South Africa will host the mid to high frequency division of the SKA and the core site will be populated with 64 offset Gregorian ...

  • Design and development of embedded homeplug GreenPHYTM web based system for demand side management in smart home applications 

    Ogunleye, Azeez Adeola (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: This thesis provides an overview of the design of a web-based Power Line Communication (PLC) interface. The communication system is a combination of various units such as a webpage, a webserver, a power ...

  • Practical measurements of Wi-Fi Direct in content sharing, social gaming android applications 

    Schoonwinkel, Daniel (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Wi-Fi Direct is a recent expansion to the very successful 802.11 Wi-Fi technology. According to Wi-Fi Alliance, Wi-Fi Direct is being broadly adopted, among others by Google’s Android (since version 4.0 ...

  • Automated aerial refuelling of a large receiver aircraft 

    Kriel, Steven Cornelius (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Performing aerial refueling of a large receiver is an extremely strenuous task for a pilot. Automating the aerial refueling for a large receiver is thus highly desirable. While significant research has ...

  • Optimal Control for Minimum Thrust Demand in Extended Formation Flight 

    Van Wyk, F. G. (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The research drive behind this formation fight thesis is to increase the flight efficiency of commercial aircrafts. Previous research has shown that formation fight holds significant fuel savings for the ...

  • Design of an ironless doublee-rotor radial flux air-cored permanent magnet machine 

    Oosthuizen, Gert Immelman (Stellenbosch : Stellenbosch University, 2016-03)
    AFRIKAANSE OPSOMMING: Hierdie tesis bevat navorsing oor die Ysterlose Dubbel-rotor Radiale Vloed Permanente Magneet (YDRVPM) masjien. Die masjien word uitgeken deur 'n rotor topologie wat slegs magnete bevat en sonder 'n ...

  • Thermal analysis of commercially available water heaters: a focus on the South African national standard 

    Reid, Gunnar James (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The improvement of energy efficiency in the residential sector is one of the simplest ways of making the use of resources more sustainable. One of the strategies used is to look at those household appliances ...

  • Fast design and optimisation of one-dimensional microstrip patch antenna arrays 

    Klopper, Brandt (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: This thesis proposes a method for the design of one-dimensional, uniformly spaced, nonuniform amplitude microstrip patch antenna arrays using computationally inexpensive transmission-line models and space ...

  • The design of a dual reflector feed using surrogate modeling techniques 

    Vermeulen, Alexander Alfons (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: The optimisation of a feed horn for a dual Gregorian reflector antenna system using surrogate modelling was investigated. This included a brief overview of dual reflector antenna systems as well as their ...

  • Miniaturised multilayer RF and microwave Circuits 

    Nassar, Shamim Omar (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: Ceramic and laminate multilayered technologies are explored in the design of novel circuit topologies and in novel implementations of classical circuit topologies. A cross-slot coupled filter topology ...

  • Investigation and characterization of the HERA dish and feed using electromagnetic simulations 

    Venter, Mariet (Stellenbosch : Stellenbosch University, 2016-03)
    ENGLISH ABSTRACT: This thesis presents the results of the electromagnetic analysis of the dish and feed for the Hydrogen Epoch of Reionization Array (HERA) experiment. The science goal for HERA is a challenging task in ...

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