رضا فرجی‌دانا
استاد، قطب علمی سیستم‌های الکترومغناطیسی کاربردی، دانشکده مهندسی برق و کامپیوتر، دانشگاه تهران
[ 1 ] - روشی نوین برای محاسبه میدان‌های الکترومغناطیسی القایی در سلول‌های زیستی بر اساس توالی توابع تبدیل
این مقاله رویکرد محاسباتی جدیدی را معرّفی می‌کند که می‌تواند تخمین مناسبی را از میدان‌های القایی در کلّی‌ترین تا جزئی‌ترین اجزای بدن حاصل کند. اساس نظری این رویکرد استفاده از تحلیل چندمقیاسی و تحریک مدل‌های مقیاس‌های کوچک‌تر با میدان‌های به دست آمده در حل مقیاس بزرگ‌تر است. شیوه اجرای روش در این مقاله تشریح و با مثالی کاربردی، میدان الکتریکی القایی بر غشای سلولی با موفقیت در چند ...
[ 2 ] - Change in Oxygen Absorption of Human Adult and Fetal Hemoglobin Due to 940 MHz Electromagnetic Field Radiation Exposure
The effects of electromagnetic fields (EMFs) radiation at the frequency of 940 MHz on the structure and function of human adult and fetal hemoglobin (HbA and HbF) were studied. After extraction and purification of HbA and HbF, the oxygen absorption values for exposed and unexposed HbA and HbF to EMF were compared. The slope of oxygen absorption curve for exposed HbA was increased while that for...
[ 3 ] - Complementary Periodic Structures for Miniaturization of Planar Antennas
In this paper various layered planar periodic structures which provide miniaturization of planar antennas are proposed and discussed. The proposed designs are based on two concepts, reactive impedance surfaces and complementary periodic structures. In the proposed structures, complementary periodic rings and slots are patterned on the intermediate boundaries of the dielectric layers. A patch an...
[ 4 ] - Development of a free anthropomorphic voxel model of human body for wide-band computational electromagnetics dosimetry
To calculate and evaluate wave scattering and penetration of electromagnetic waves in different biological tissues it is necessary to use a realistic model of the human body, with all tissues resolved and separately assigned with appropriate electric/magnetic properties. We report the development of a realistic 3D whole-body human model that has been adapted for simulation in CST software, cont...
[ 5 ] - Study of Ultra-weak CW and Amplitude-Modulated Microwaves effects on stem Cell Proliferation: an Experimental and Hypothetical Approach
Weak microwave radiation (WMR) in our environment has raised health concerns in the public. Among those, communication frequencies are more than ever becoming widespread and their effects need thorough studies. A correct understanding of these effects in-vivo by in-vitro experiments shall preferentially use primary cells. In this study we compared non-modulated (CW) and modulated WMR exposure o...
[ 6 ] - Efficient Analysis of Plasmonic circuits using Differential Global Surface Impedance (DGSI) Model
Differential global surface impedance (DGSI) model, a rigorous approach, has been applied to the analysis of three dimensional plasmonic circuits. This model gives a global relation between the tangential electric field and the equivalent surface electric current on the boundary of an object. This approach helps one bring the unknowns to the boundary surface of an object and so avoid volumetric...
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