Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Odendaal, J.W. (Johann Wilhelm)"
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Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Odendaal, J.W. (Johann Wilhelm)"
Now showing items 1-20 of 22
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(University of Pretoria, 2018)Dual-circularly polarized antennas usually consist of a radiating structure and a feed network capable of generating the �90� modes required for dual circular polarization. The problem is that these feed networks often ...
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(University of Pretoria, 2019)The continuously growing number of wireless devices and the demand for wireless local area network (WLAN) coverage received a lot of research and design attention during the past decade. The WLAN application is a popular ...
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(University of Pretoria, 2019)The continuously growing number of wireless devices and the demand for wireless local area network (WLAN) coverage received a lot of research and design attention during the past decade. The WLAN application is a popular ...
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(University of Pretoria, 2006-06-03)The spatially distributed adaptive array is defined and analyzed. It is applied to both time division multiple access (TDMA) and code division multiple access (CDMA) cellular networks to improve the outage probability at ...
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(University of Pretoria, 2023)Over the past few decades radar cross section (RCS) manipulation has become increasingly important. This increase in interest is due to the development and improvement of stealth technology. While many RCS manipulation ...
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(University of Pretoria, 2010-08-20)A uniplanar balun that transforms unbalanced coplanar waveguide (CPW) to balanced coplanar strip line (CPS) is characterised through simulation and measurement. By illustrating the effect of many of the critical design ...
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(University of Pretoria, 2010-06-14)Cross-eye jamming is an Electronic Attack (EA) technique that induces an angular error in the radar being jammed. The main benefit of cross-eye jamming is that it is effective against monopulse tracking radars, which are ...
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(University of Pretoria, 2017)The primary objective of this investigation was the development of a design procedure for a compact wearable antenna operating at 433 MHz that can be used for finding lost miners in underground mines in emergency situations. ...
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(University of Pretoria, 2005-09-21)The principal contributions of this study include the development of a new capacitive feeding mechanism for wideband probe-fed microstrip patch antennas as well as the implementation of a spectral-domain moment-method ...
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(University of Pretoria, 2022)In recent years reconfigurable antennas have gained a lot of attention for the advantages they present for diversifying the capabilities of communication systems. Many types of reconfigurable antennas exist that have ...
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(University of Pretoria, 2011-02-25)The recent growth in the ambit of modern wireless communication and in particular WLAN (Wireless Local Area Network) systems has created a niche for novel designs that have the capacity to send and/or receive arbitrary ...
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(University of Pretoria, 2011-05-20)It is known that the 1-18 GHz Double Ridge Guide Horn (DRGH) antenna is highly sensitive to tolerances in manufacturing. Since a typical DRGH antenna is constructed from a number of individual parts, tolerances in the ...
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(University of Pretoria, 2015)Conventional rectangular waveguides are commonly used for high power and millimetre wave microwave applications. However their use at lower frequencies has been limited by their bulky nature at these frequencies. A new ...
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(University of Pretoria, 2018)The demand for modern wireless communication systems have grown at a remarkable rate and the Wireless Local Area Network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) frequency bands have been recognized ...
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(University of Pretoria, 2008-08-06)Slot dipole antennas fed by coplanar waveguide (CPW) on substrates consisting of a single dielectric layer exhibit various attractive qualities, including significantly wider impedance bandwidth than comparable microstrip ...
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(University of Pretoria, 2006-05-16)As the wireless communications networks expand, the number of both unwanted directional interferences and strong nearby sources increase, which degrade system performance. The signal-tointerference ratio (SIR) can be ...
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(University of Pretoria, 2013)It is well known that quad-ridged horn antennas in general have impedance and radiation characteristics that are significantly worse than that of their double-ridged counterparts. Normally a voltage standing wave ratio ...
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(University of Pretoria, 2017)The design of a monopulse microstrip wire grid antenna array is presented with simultaneously low side lobe levels in the sum pattern as well as both azimuth difference and elevation difference patterns. Monopulse antennas ...
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(University of Pretoria, 2012-08-14)Reflector antennas used for radio astronomy require feeds that use the reflector surface as efficiently as possible while maintaining low noise levels. The specifications of new radio astronomy telescopes under development ...
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(University of Pretoria, 2007-01-03)No abstract available
Now showing items 1-20 of 22