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Now showing items 1-10 of 12
Prediction and measurement of power line carrier signal attenuation and fluctuation
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the
ability to simulate signal attenuation including the coupling equipment, was
developed. This simulation program was put to the ...
Simple broadband measurements of balanced loads using a network analyzer
(Stellenbosch : Stellenbosch University, 2001-04)
ENGLISH ABSTRACT: Balanced loads such as antennas normally require baluns when they are measured. For
wide band applications, designing and building a balun complicates the measurement and
introduces errors. A simple ...
The placing of line surge arresters and fuses on 11 and 12 kV lines to protect equipment against lightning
(Stellenbosch : Stellenbosch University, 2001-03)
ENGLISH ABSTRACT: Unshielded distribution lines has a poor performance during lightning activity. Lightning
initiates flashovers between the phases and earth and causes line breakers to trip several
times during a ...
Advanced modelling of a borehole radar environment with the finite difference time domain method
(Stellenbosch : University of Stellenbosch, 2001-12)
Over the last decade, as the mining industry of South Africa is moving
to ever deeper mines, the borehole radar is becoming an increasingly important
field of research.
In December 2000, Burger completed his thesis on ...
Middleware for the SUNSAT field station
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: SRMA currently used on the SUNSAT field station is an effective MAC layer protocol but lacks
several features. Sufficient support for flexible communication, acknowledgement of individual
data packets, ...
Micro-satellite data handling : a unified information model
(Stellenbosch : Stellenbosch University, 2001-04)
ENGLISH ABSTRACT: This thesis describes various software technologies implemented, or specifically developed,
for the SUNSAT micro-satellite mission.
With the discussion centered on the Mission Operations System functions ...
Neural network models of slotted waveguide directional couplers
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: The application of artificial neural networks to microwave circuits is investigated. A neural
network model is developed for two parallel waveguides coupled by a longitudinal slot in the
common broad ...
Investigating cable transfer impedance and layout for microsatellite applications
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: The co-existence of electronic devices and their attached transmission cables requires a
careful planning regarding the energy leakage across cable shields. This leakage poses
potential serious problems ...
Analysis and synthesis of an active resonant snubber for high-power IGBT converters
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: This thesis describes the study of two soft-switching inverter topologies that are well suited to
high-power applications. For the first topology, namely an active resonant turn-off snubber,
the existing ...
Design of a forward error correction algorithm for a satellite modem
(Stellenbosch : Stellenbosch University, 2001-12)
ENGLISH ABSTRACT: One of the problems with any deep space communication system is that information may
be altered or lost during transmission due to channel noise. It is known that any damage
to the bit stream may lead ...