Now showing items 1-11 of 11

  • Acoustic Vector Network Analyser

    Pennington, Kyle (The University of Waikato, 2017)
    This research aims at increasing the accuracy and precision of characterising acoustic materials by adapting well-known techniques developed for the radio-frequency domain to the acoustic domain. Two novel methods are ...
  • Application of Nonlinear Transistor Characteristics

    Balsom, Toby (University of Waikato, 2014)
    This research presents three works all related by the subject of third-order distortion reduction in nonlinear circuits. Each one is a novel extension to previous work in that branch of electronics literature. All three ...
  • Assessment of Standing Herbage Dry Matter Using A Range Imaging Sytem

    Benseman, Mark (University of Waikato, 2013)
    It has been known for a long time that a device that could quickly and accurately ascertain dry matter content would be very useful to pastoral farmers. Despite many years of various products being developed there is still ...
  • Frequency Response of an Agricultural Fence and the Implications for Data Transmission

    McMullan, Jonathon (University of Waikato, 2014)
    The electric fence has been used as a data transmission medium in Gallagher Products for a number of years. This has allowed the energizer to be remotely controlled and, with the current generation, to monitor the performance ...
  • iDCC - Hardware, Software and Marketing of a Usable Digital Command Controller

    Chang, Benson (University of Waikato, 2013)
    iDCC is the new implement of Digital Command Control (DCC) with a better user interface and a much better user experience compared to the existing DCC controllers on the market. The iDCC project was carried out firstly at ...
  • Impulse TDR and its Application to Characterisation of Antennas

    McCabe, Steven Owen (University of Waikato, 2011)
    Passive microwave systems are traditionally characterised in the frequency-domain with a vector network analyser (VNA). The measurement of antennas typically takes place in an anechoic chamber where the interference from ...
  • Millimetre Wave Power Measurement

    Jones, Mark Hedley (The University of Waikato, 2010)
    There is currently no traceable power sensor for millimetre wave frequencies above 110 GHz. This thesis investigates a novel approach to remove this limitation by combining the placement of a uniquely designed microchip ...
  • Scaling acoustic directional couplers using 3D printing

    MacDonell, Marcus Scott Glengarry (University of Waikato, 2015)
    Acoustic directional couplers permit separation of forward and reverse sound pressure waves. This separation opens the way to traceable, precision acoustic reflection measurements. In order to span the audio spectrum, ...
  • Surface Roughening of Platinum Wire: An Electrochemical and Mechanical Approach

    Gygax, Stefan Manu (University of Waikato, 2017)
    In order to make implanted electrodes MRI safe several methods have been explored. One of those methods involves increasing AC resistance by roughening the surface of the implanted platinum wires. This thesis explores an ...
  • The Art of Coffee Roasting: Investigations into Sensor Development for the Application of Controlling Coffee Roasting

    Kelly, Cameron Brian Desmond (The University of Waikato, 2018)
    In this thesis, I investigate novel methods of sensing change in roasting coffee. Coffee roasting is a vital step in coffee’s supply chain. It is the process that takes green coffee and transforms it via a series of many ...
  • The Electrical Properties of Interfacial Double Layers

    Jones, Mark Hedley (University of Waikato, 2016)
    When solids and liquids are brought together, interfacial double-layers are likely to form. They are too small to feel or see so their presence goes mostly unnoticed at the macroscopic level. A double layer is essentially ...