Accurate Simulation of the Radiation Performance of a Mobile Slide Phone in a Hand-Head Position

Abstract

An accurate simulation of the radiation performance of a commercial CAD-oriented slide mobile phone, taking into account the influence of the SAM (specific anthropomorphic mannequin) head and hand, is presented. The simulation was performed using the commercial software SEMCAD, which is based on the Finite-Difference Time-Domain (FOTO) Method. The radiation effect on the SAM head and hand close to the phone was also investigated. Throughout the numerical simulations, the retum loss, the radiation efficiency, and the near-field distribution of the mobile phone could be obtained, and thus the impact on the human body could be estimated. The slide phone was measured under different conditions. Numerical results were compared with the measurement data, and good agreement was obtained.

2.4 GHz/5.6 GHz Dual‐Use Wearable Patch Antenna Integrated with Electrodes and Parasitic Element for Wireless Body Area Network

“…However, in the 180 • direction, where the arm model is located, the antenna gain dropped to −20 dBi. This decrease in antenna gain is unavoidable due to signal attenuation in biological tissues at high frequencies [9]. We posit that the proposed antenna can mitigate these null points through HBC operation, leveraging different signal propagation methods.…”

Isolation improvement of compact LTE MIMO terminal using combination of neutralisation line and modified ground structure

“…Given the actual scenario limitation and requirement of low profi le with good impedance matching over the multi-band is indeed challenging from the antenna design point of view. So far, many researchers have reported on studies of mobile terminal antennas in close proximity of the human body (Pelosi et al, 2010;Yu et al, 2010;Gao et al, 2013;Zhang et al, 2013;Singh et al, 2015). However, some of the studies are carried out over a single antenna element (Pelosi et al, 2010;Yu et al, 2010;Gao et al, 2013) while in Zhang et al (2013), four elements are considered on the mobile phone printed circuit board (PCB) for adaptive analysis.…”

Biological Effects of Environmental Electromagnetic Fields

“…Cell hones are powerful wireless devices, its connectivity is enabled by the antennas inside which can emit electromagnetic field, and in our common usage, the cell phone is held next to the head, so about half of electromagnetic field energy is absorbed by head [1]. Many studies also indicate potential use of cell phones could cause brain tumors and cataracts in human body [2,3], Power frequency current (60Hz) and its electromagnetic field is stronger near points of electrical use and distribution [4], and in human arterial system some effects of power line was simulated, peripheral impedance is calculated theoretically [5], There are many other instances of effects of electromagnetic fields from cell phones, power lines, increasing risk of cancer, loss of fertility and unpleasant physiological symptoms and so on [6,7,8,9]. In the following paper, propagation characteristics of some form of environmental electromagnetic fields in human body are investigated theoretically, attenuation characteristic of environmental electromagnetic fields propagate in human body is examined, then the penetration depth of the electromagnetic fields in the human body is analyzed, and from those propagation characteristics, some more information of the environmental electromagnetic fields are discussed.…”