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JEMAA is a professional journal in the field of electromagnetic analysis, testing and application. The goal of this journal is to provide an international platform for engineers and academicians all over the world to promote, share, and discuss various new issues and developments in the field of electromagnetics. It i…
Gafur Gulyamov, Muhammadjon Gulomkodirovich Dadamirzaev, Nosir Yusupjanovich Sharibayev, Ne’matjon Zokirov
It is shown that the increase in the current of an asymmetric p-n-junction, caused by perturbation of potential barrier height and increasing recombination current in a strong microwave field, is suppressed by light generated photo carriers, leading to the di…
Mohamad Y. Abou-Shahine, Youssef Nasser, Karim Y. Kabalan
This paper presents a high efficiency Doherty power amplifier suitable for TV band applications. A class AB power amplifier is firstly implemented using a commercial GaN HEMT from Cree Incorporation, achieving a high power-added-efficiency of 77.78% and a 40.…
Abdessalem Kaddouri, Mourad Aidi, Taoufik Aguili
In previous modeling works, the waveguide radiation in the free space is modeled using an infinite flange in aperture plan. In this paper, we propose a new formulation to analyze the radiation of twin rectangular waveguides in free space. Our formulation cons…
Ammar Armghan, Xinguang Hu, Shuai Yuan, Jinsong Xia
Metamaterial structure based on split ring resonators (SRR) is proposed in order to produce a negative refractive index. For this structure we have used a new approach, instead of applying light perpendicularly incident. We apply horizontally incident input w…
Salama Abdelhady, Mohamed S. Abdelhady
As a result of investigating analytically and experimentally the interchangeability between thermal, electrical and magnetic energies, it is proved in the presented study that the electric and magnetic energies have an equivalent grade and nature as the therm…
S. Koshevaya, V. Grimalsky, Y. Kotsarenko, J. Escobedo-Alatorre
In this article, the comparison of excitation in high frequencies of acoustic-electromagnetic wave in piezoelecric crystal and crystal with potential of deformation GaAs is investigating. Possible mechanisms of coupling different hybrid waves are the piezoeff…
Norbert Leitgeb
In spite of 36 years epidemiologic research, there is still an ongoing controversy about a causal link between childhood leukemia (CL) and exposure to extremely low frequency (ELF) magnetic fields (MF). Public concern has been increased by the fact that ELF M…
Norbert Leitgeb
Concern about brain cancer risks from mobile phone use, in particular of glioma, is mainly based on epidemiologic studies reporting on an increased risk estimate (odds ratio, OR) in particular of long-term and/or heavy users. Concern is enhanced by contradict…
Altair S. de Assis, Hector Torres-Silva, Göran T. Marklund
In this paper, we coupled the Quantum Mechanics conventional Schr ö dinger’s equation, for the particles, with the Maxwell’s wave equation, in order to study the potential’s role on the conversion of the electromagnetic field energy to mass and vice vers…
Douglas Letsholathebe, Kgakgamatso Mphale
A fuel bed was constructed where various vegetation species could be used as combustion fuel. The fuel bed was equipped with a thermocouple to measure fire temperature and a two-port automatic network analyser to measure microwave scattering parameters in fla…
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JEMAA is a professional journal in the field of electromagnetic analysis, testing and application. The goal of this journal is to provide an international platform for engineers and academicians all over the world to promote, share, and discuss various new issues and developments in the field of electromagnetics. It i… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
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