Optimizing the heating properties of magnetic nanoparticles is of great importance for hyperthermia applications. Recent experimental results show that core/shell nanoparticles could give an increased specific absorption rate (SAR) compared to the magnetic oxide nanoparticles currently used. We have developed a modified phenomenological model based on the linear Néel-Brown relaxation model to c...

This study investigates the performance of a dipole antenna above electromagnetic band gap (EBG) substrates with different number of patches to realize a low specific absorption rate (SAR) antenna for a 4G wireless communications system (3.5 GHz band). A cubic head model is used for the initial analysis to estimate the radiation characteristics and the SAR of the antenna. Computational results ...

Harmful effects of electromagnetic fields (EMF) on cognitive and behavioural features of humans and rodents have been controversially discussed and raised persistent concern about adverse effects of EMF on general brain functions. In the present study we applied radio-frequency (RF) signals of the Universal Mobile Telecommunications System (UMTS) to full brain exposed male Wistar rats in order ...

SUMMARY In this study we have employed an effective technique for dosimetric analyses of base station antennas in an underground environment. The technique combines a ray-tracing method and the finite-difference time-domain (FDTD) method to calculate the specific absorption rate (SAR) in the human body. The ray-tracing method was applied to evaluate the incident fields in relation to the expose...

Introduction: When using parallel transmission at high field, it is well established that high local specific absorption rate (SAR) values can occur [1]. A conservative approach to guarantee patient safety can be provided by using the worst-case scenario to derive the limits to be enforced by the SAR monitor [2]. This approach significantly limits the in-vivo applications of parallel transmissi...

In this paper, a wearable dual-band T-shaped antenna using coplanar waveguide (CPW) fed operating at 2.4 GHz and 5.2 bands is proposed for onbody wireless communications applications. Without the metamaterial-based electromagnetic bandgap (EBG) layer, original covers two from 1.96 to 2.77 5.07 5.35 GHz. The efficiency decreases when it placed on human arm due interference body antenna, as shown...

This research presents a compact panda-shaped wearable antenna with defected ground structure (DGS). It is fabricated using flexible material to work at 2.4-GHz industrial scientific medical (ISM) band, confirming the wireless body area network (WBAN) application requirements. The annular ring DGS and circular elliptical slots in patch aid achieving operating frequency. Good impedance bandwidth...

This study analyzes the exposure of the human torso to electromagnetic fields caused by wireless body-mounted or handheld devices. Because of the frequency and distance ranges from 30-5800 MHz and 10 to 200 mm, respectively, both near-field and far-field effects are considered. A generic body model and simulations of anatomical models are used to evaluate the worst case tissue composition with ...