Thesis (MScIng)--University of Stellenbosch, 2006. / Bibliography. Also available via the Internet.

The microwave resonator method for studying small amplitude surface waves in liquids has been improved by making the time measurement more accurate and much more convenient. It was used to measure the oscillation frequency of the surface as a function of liquid depth. Discrepancies between the experimentally obtained results and theoretical predictions due to the rigidity of the mercury meniscus where contact is made with the walls of a cylindrical resonator were found. From these an accurate value for the effective reduction in radius of the resonator because of the meniscus effect was obtained. A method was developed for applying strong electrostatic fields (about 20 kV/cm) onto the fluid surface without interfering with the measuring technique. An interesting result of this was the observation that the field cleans the surface from contamination. This phenomenon manifests itself in a marked reduction in the damping of surface waves just after a large field is applied. A resonator of square cross-section was used to demonstrate the Fourier analyzing property of rectangular resonators. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

No description available.

Call number: LD2668 .T4 1959 C73

Call number: LD2668 .T4 1961 W55

Thesis (MTech (Electrical Engineering))--Peninsula Technikon, 2002. / Word processed copy. Summary in English. Includes bibliographical references (leaves 148-149). Also available online.

Thesis (M. S.)--Aerospace Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Jagoda, Jechiel; Committee Co-Chair: Jacobs, Laurence; Committee Member: Seitzman, Jerry. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis--University of Washington. / "This research has been supported by NASA Grant NsG-632 to the Department of Atmospheric Sciences, University of Washington, and by The Boeing Company." Bibliography: p. 195-198.

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2006. / Littles, Jerrol W. Jr., Committee Member ; Johnson, W. Steven, Committee Member ; Kurfess, Thomas R., Committee Chair ; Melkote, Shreyes N., Committee Member.

Thesis (MTech (Electrical Engineering))--Peninsula Technikon, Cape Town, 2002. / Tne purpose of this research or study was to perform an investigation in the use of optical fibers as sensor elements in order to develop a millimetre wave instrument capable of measuring microwave power within microwave cavities. Included in the scope of the project was an investigation of microwaves and microwave power measurements techniques. The emphasis of the research work was to develop expertise in photonics, by modeling and developing a measuring technique using optical techniques. This was deemed to be highly beneficial in laboratory experimentation and for possible use by microwave technicians. The implementation was amongst others, done by means of computer simulation and associated hardware, together with fiber-optic accessories. In order to conduct this research a literature and technology survey of current non-optical microwave power measurement technique was done. With this a review different power measurements systems and their relationship towards microwave power measurements was conducted. Within the scope of the project, a study of fiber optics sensors and its components was also conducted, which enabled models for a Mach-Zehnder microwave sensor to be developed. This resulted in the development of inexpensive electronic signal conditioning and detection techniques to enable measurements that employed a Mach-Zehnder Interferometer for this sensor technique. Finally, as microwaves are difficult to measure with pure electronic equipment, different approaches were made to investigate the temperature changes and other parameters on optical fiber to avoid damage to it. The specifications of hardware and circuitry suitable to measure these effects were determined.