Thesis (MScEng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

The problem of electromagnetic field penetration in the finite-resistivity conductors of a uniform, multiple, coupled transmission line system (MTL) is considered. Under the assumption of quasi-transverse electric and magnetic (quasi-TEM) mode of propagation, the problem of determining the per-unit-length resistance and inductance matrices for such MTL systems reduces to solving a quasi-magnetostatic problem. An integral equation for the current density distribution inside the conductors is formulated and solved numerically using the method of moments. From straightforward energy considerations and the current density distribution, the per-unit-length resistance and inductance matrices are calculated. Several microstrip configurations are then analysed and the effects of the geometrical characteristics of the structures on the per-unit-length inductance and resistance matrices, as well as their frequency dependence are investigated.

No description available.

Thesis (M. Phil.)--University of Hong Kong, 2002. / Includes bibliographical references.

Absorber lined chambers (ALC's) or anechoic type enclosures operated under degraded conditions are introduced. Results of measurements inside scaled model ALC's are reported to demonstrate the feasibility of their use as environment simulators for electromagnetic susceptibility (E.M.S.) measurements over an extremely wide frequency range. The hardware and software of the automated microprocessor based facility developed for the measurement of amplitude and phase of e.m. fields in a volume of space, are described. / A geometrical optic (GO) technique and an 'idealized' material model to predict ALC fields is developed. Computed results are presented for a range of cases including some whose measurement would not be practicable. Using measured and computed data, criteria and guidelines for economic ALC design are established. / An experimental investigation of near-region scattering by various absorbers was carried out to seek the possibility of improving the material model with the objective of improving field prediction using the geometrical theory of diffraction (GTD).

Thesis (PhD)--University of South Australia, 2000

Thesis (PhD)--University of South Australia, 2000

Thesis (PhD)--University of South Australia, 2000

Thesis (M. Eng.)--Carleton University, 1992. / Also available in electronic format on the Internet.

M.Ing. / Open-wire telecommunications were developed in the 19th and early 20th centuries without any consideration of the deleterious effects of power lines; compatibility problems were later caused by the proximity of power lines and telephone lines. The coexistence of such systems requires careful planning in terms of energy coupled to the telephone lines; this induction can cause interference, as well as dangerous overvoltages in telephone circuits, and requires detailed studies of the effects of coupling between high voltage lines and telephone systems to be done. In terms of inductive co-ordination in South Africa, the minimum separation distances between high voltage power lines and communication systems are calculated only for power frequency and lower order harmonics (up to the 13th). The aim of the study was to explore the agreement between theory and measurement for frequencies from 50 Hz to the high order harmonic range of 4 kHz; this makes it possible to extend existing methods for predicting compatible separations to cases where high order harmonics (up to the 73rd) are present (balanced and unbalanced) on a 132 kV power line feeding a large aluminium smelter plant.