• Wideband coaxial cable transfer impedance for Karroo Array Telescope 

      Andriambeloson, Joely Andrianina (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: Through the Karoo Array Telescope, and its extension MeerKAT, South Africa is demonstrating its capabilities to host the most powerful radio telescope ever, the Square Kilometre Array (SKA). This new ...
    • Tune-all wideband planar filters for KAT-7 

      Beukman, Theunis Steyn (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: A new type of wideband lters, with tunability in both the centre frequency and bandwidth, is presented in this thesis. These lters are based on perturbed ring-resonators in cascade, while varactor ...
    • Reduction of the antenna coupling in a bi-static, FM-CW radar system 

      Malan, Frederich T (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: A well-known problem with FM-CW radar systems is the leakage of transmitter power into the receiver which leads to the making of close-in targets, and can severely limit the system dynamic range performance. ...
    • Predictive control of a series-input, parallel-output, back-to-back, flying-capacitor multilevel converter 

      Du Toit, Daniel Josias (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: This thesis investigates the viability of constructing a solid-state transformer (SST) with a series-input, parallel-output connection of full-bridge, three-level ying-capacitor converters. It focusses ...
    • Optimisation of a transverse flux linear PM generator using 3D Finite Element Analysis 

      Schutte, Jacques (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: Several transverse flux and longitudinal flux linear generator topologies exist for freepiston Stirling engine applications. In this thesis the transverse flux permanent magnet linear generators are ...
    • On the use of WiMAX and Wi-Fi in a VANET to provide in-vehicle connectivity and media distribution 

      Mojela, Lerotholi Solomon (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The recent emergence of ubiquitous wireless connectivity and the increasing computational capacity of modern vehicles have triggered immense interest in the possibilities of vehicular connectivity. A ...
    • A network traffic analysis tool for the prediction of perceived VoIP call quality 

      Maritz, Gert Stephanus Herman (Stellenbosch : University of Stellenbosch, 2011-12)
      ENGLISH ABSTRACT: The perceived quality of Voice over Internet Protocol (IP) (VoIP) communication relies on the network which is used to transport voice packets between the end points. Variable network characteristics ...
    • An investigation of the equivalence between combline and evanescent-mode waveguide filters & of aspects related to reduction of manufacturing costs for combline filters 

      Nassar, Shamim O. (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: An investigation of the functional similarities and di erences between a combline lter and an evanescent-mode waveguide lter is presented. The design theory of the two types of lters is outlined. Two ...
    • The investigation and development of gas sensors with carbon nanomaterials 

      De Jager, Nicolaas Jacobus (Stellenbosch : University of Stellenbosch, 2011-12)
      ENGLISH ABSTRACT: In this research the possible utilization of carbon nanomaterials in gas sensing applications are investigated. These materials include the 2-dimensional honeycomb-lattice carbon structure called graphene, ...
    • Fault tolerant adaptive control of an unmanned aerial vehicle 

      Basson, Willem Albertus (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: This thesis presents the development of an adaptive longitudinal control system for an unmanned aerial vehicle (UAV). The project forms part of a research effort at Stellenbosch University into different ...
    • Electronically adjustable bandpass filter 

      Terblanche, Phillip (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: This thesis presents the study, analysis and design of electronically tunable filters, that can be tuned over a wide frequency range (20-500MHz), for use in a direct sampling receiver. The final design ...
    • Design and implementation of the main controller of a solid-state transformer 

      Schietekat, Louis Magnus (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The Solid-State Transformer (SST) is presented as an alternative to the traditional Line-Frequency Transformer (LFT) used for voltage-level transformation in distribution grids. The LFT technology is ...
    • Design and implementation of a RSFQ superconductive digital electronics cell library 

      Bakolo, Rodwell S. (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: Rapid Single Flux Quantum (RSFQ) cells are key in the design of complex and applicable RSFQ electronic circuits. These cells are low-level circuit elements that are used repeatedly to build larger, ...
    • The design and development of an ADCS OBC for a CubeSat 

      Botma, Pieter Johannes (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The Electronic Systems Laboratory at Stellenbosch University is currently developing a fully 3-axis controlled Attitude Determination and Control Subsystem (ADCS) for CubeSats. This thesis describes the ...
    • Coaxial resonator filters 

      Maas, Susan (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The purpose of this project is to develop a number of coaxial resonator lters. Firstly, the theoretical model of the lter is discussed, with a Tchebyscheff LC-ladder prototype lter used to derive a ...
    • Characterisation of L-band differential low noise amplifiers 

      Prinsloo, David Schalk Van der Merwe (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: This thesis addresses the complications that are encountered when characterising the performance of differential microwave LNAs. The predominant sources of noise in electronic circuits are introduced and ...
    • Autonomous airborne refueling : relative state estimation 

      Runhaar, Anton Johan (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: This thesis presents the development of a state estimation system for use in an Autonomous Airborne Refueling (AAR) operation through the simulated implementation of GPS, monocular and stereoscopic ...