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The present study investigates the relationship between the maximal temperature elevation and peak mass-averaged specific absorption rate (SAR) in different human head models, for frequencies ranging from 1 to 10 GHz. A half-wave dipole antenna is considered as a wave source at respective frequencies. Bioheat equation is used to compute the microwave-induced temperature elevation. In the post-processing,...
The rapid expansion of wireless telecommunication service causes a dramatic increment of the amount of electromagnetic field (EMF) exposure in our environment (1). Radiofrequency identification (RFID) has recently been introduced to the wireless RF systems. RFID is also widely used in industrial settings and even throughout daily life (1). There are some workers who may used to be exposed to EMF such...
In this study, a dual-band high-impedance surface (HIS) structure and a dual-band monopole antenna were designed for 2.45 GHz and 5.25 GHz WLAN applications. This HIS structure was proposed as an electromagnetic (EM) protective sheet to reduce undesirable EM radiation of antenna. The effects of EM protection sheets including metallic plates, R-cards, and HIS on the specific absorption rate (SAR) and...
Recently, wireless radio terminals such as mobile phones and tablet computers are increasing and developing rapidly. The effects of the electromagnetic (EM) waves in the human body from the wireless radio terminal have been paid attention. Therefore, we have calculated the specific absorption rate (SAR) in human tissues radiated from simple EM source models as like dipole antennas. In this paper,...
Dosimetry for the two resonant modes of resonance-based wireless power transfer system is investigated and compared. We present the physical mechanism for the two resonant modes with the simulated results and the equivalent circuit models for the wireless power transfer system. The difference between the two resonant modes for the specific absorption rate induced in the head model is discussed by...
There are many commercial shields for 3G and 4G mobile phones re-emerging onto the market, claiming specific absorption rate (SAR) reduction; however their effectiveness is questionable. In this paper, their SAR and induced electric field (E-field) are measured, and the corresponding induced E-field inside the human body with and without implanted medical devices is analyzed. Results have indicated...
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