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Electromagnetic theoretical concepts, which are represented mathematically, are usually challenging to grasp by students. In this study, we explore an interactive technology-based teaching tool to develop further students’ mastery of electromagnetic concepts through learning development and visualization of electromagnetic problems. This visualization of the problems will help students analyse, evaluate,...
Estimating the pathloss and signal strength of the transmitted signal at specific distances is one of the main objectives of network designers. This paper aims to provide generalized pathloss models appropriate for urban areas in Muscat the capital city of the Sultanate of Oman environment. The research includes studying different models of pathloss for the 4G cellular network at Muttrah Business...
Nowadays, the world is turning into technology, fast internet and high signal quality. To ensure high signal quality, the network planners have to predict the pathloss and signal strength of the transmitted signal at specific distances in the design stage. The aim of this research is to provide a generalized pathloss model to suit the urban area in Muscat Governorate in the Sultanate of Oman. The...
In this paper, electromagnetic radiation leakage through airflow openings found in modern personal computers and mobile electronic devices (i.e., enclosures) is experimentally studied in the low frequency regime. Three different designs of enclosure's covers are assessed through experimental work. The three airflow covers of the shielding enclosure cases comprise the use of all holes (case 1), hexagon...
In this paper, a technique is proposed for enhancing energy harvesting devices. The design is capable of charging small power consumption sensors by capturing ambient radio frequency (RF) waves. The technique comprises the use of high-profile monopole antenna array with a reflector in order to maximize the RF energy received by the antenna system. Furthermore, a prototype of the proposed RF energy...
This paper describes a method of charging a low power sensor by harvesting RF signals. The paper introduces an integration scheme of the RF harvester consisting of voltage booster and a rectifier to convert the AC voltage to DC voltage. The work presented here focuses on modeling and implementation of a design. Results show good improvement.
This paper attempts to provide some insight into the nature of radio propagation in that part of the spectrum (UHF) used by experimenters. As we know that the need for high quality and high capacity networks and estimating coverage accurately has become extremely important. Therefore, for more accurate design coverage of modern cellular networks, signal strength measurements must be taken in consideration,...
Efficient power amplifiers are essentially needed in portable battery-operated systems such as mobile phones because the power amplifier is the most power consuming building blocks in the transmitter of these portable systems. This paper presents efficient techniques to increase the efficiency of the power amplifier as much as possible by degrading the power dissipation of the transistor in the mobile...
This paper illustrates a new analytical model for determining equivalent salt deposit density (ESDD) on contaminated insulators using wind velocity. The analytical model is derived using the dimensional analysis technique. The values of ESDD from the analytical model are calculated using different values of wind velocity. These results are compared with the experimental results obtained from sites...
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