Victor Fouad Hanna

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This study presents a comprehensive characterization of the frequency dependence of the effective complex permittivity of bundled carbon nanotubes (CNTs) considering different densities over a broadband of frequencies from 10 MHz to 50 GHz using only one measurement setup. The extraction technique is based on rigorous modeling of coaxial and circular(More)
This paper investigates the electrical characteristics of nano-particle-based pulverized materials. A measurement setup is developed to extract the electrical properties of the composite material in its powder form. Numerical simulations are also carried out to examine and analyze the effects of embedded metallic particles in a dielectric host medium. The(More)
The conductivity of carbon nanotube (CNT) networks is investigated in this work. A mathematical model based on the percolation theory is developed to be implemented in simulation software to design CNT-based high-frequency components. For this purpose, two independent measurement setups are used to extract the conductivity of carbon nanotubes in its dry(More)
In this article, the general public daily exposure to broadcast signals and Global System for Mobile Communications (GSM) or Universal Mobile Telecommunications System (UMTS) mobile telephone signals in indoor areas is investigated. Temporal variations and traffic distributions during a day at different indoor sites in urban and rural zones are presented.(More)
At low illumination levels, the performance of image sensors is severely limited by their intrinsic electrical noise. In the buried double junction (BDJ) active pixel sensor (APS), as in any CMOS image sensor, noise is primarily due to the photodetector and to the in-pixel transistors. In this paper, we present an exact noise analysis of CMOS BDJ APS in(More)
In this paper, the general public daily exposure to radiofrequencies in indoor areas is investigated. The considered signals are FM, TV, and GSM over one day. The study focus on the determination of the distribution of FM, TV, and GSM signals in a realistic electromagnetic environment in Indoor distinguishing Urban and Rural locations. The goal is to(More)
In this paper, the complex permittivity of carbon nanotube networks is extracted over a broadband of frequencies using a non destructive, simple, and low-cost procedure. The structure holding the material under test is a hollow circular waveguide shorted at one end and connected through precision adapter to the 1.85 mm-50-Ω coaxial cable of(More)
In this paper, the general public daily exposure to mobile telephony signals, namely GSM900, GSM1800, UMTS2100 and HSDPA, is investigated. Temporal variations and traffic distribution during a day at different sites are presented. The goal is to characterize the ratio between daily maximum realistic values and maximum theoretical values. Relations between(More)
In this paper, the general public daily exposure to mobile telephony is investigated. The considered signals are GSM900, GSM1800, UMTS and HSDPA. The study focus on the assessment of the maximal real electric field received over the day from an instantaneous measurement performed any time during the day. An extrapolation factor is presented to extrapolate(More)