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Mobile telecommunication has become an indispensable part of our daily lives. The increasing demand for mobile communication services in Namibia has seen an increase in the installation of mobile base transceiver stations (MBS's) in and around residential areas, schools and hospitals. Mobile service providers usually increase the number of base stations in an area for better signal reception, thus...
This paper explores the effective temporal surface-illuminated properties of two-component composites consisting of inclusions of regularly-and irregularly-shaped crystals in a matrix. Time-domain electromagnetic modeling using the finite integration technique is used to calculate scattering parameters, and from these, the effective relative permittivities are calculated. It is shown that the...
We propose a stand-alone electric-field probe for realizing electric-field measurements within enclosures that have no slits or holes. The prototype probe has an radio frequency (RF) power detector IC, a programmable IC for storing the electric field measurement data, and a bent monopole antenna printed on a PCB that is mounted in a shielding box. The probe was evaluated using electric fields in the...
High power RF sources are in development for electron cyclotron heating of fusion plasmas. These sources generate long pulse or continuous power levels exceeding 1 MW, and 2 MW sources are in development. RF loads capable of dissipating 2MW of continuous power are required to test these new sources. 2 MW CW RF loads are being developed that utilize a unique launcher to distribute the power over a...
Two-port TEM cells with rectangular cross-section are commonly used to produce plane electromagnetic waves with high electric field. The non-uniformity of the system makes the use of numerical methods extremely useful in the design phase in order to achieve a very good behavior of the TEM cell over a wide frequency range of operation. In this paper an extended version of PEEC is used to study a real...
Measuring partial discharge (PD) activity in high voltage plant is a well established technique used to monitor insulation integrity. A partial discharge is a surge of electrons within a dielectric due to ionisation caused by the electric field and it is a sign of insulation degradation or overstressing. The acceleration of electrons creates electromagnetic radiation. This paper studies the high frequency...
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