A planar compact multiband monopole antenna is presented for ultra-slim mobile handset applications. The proposed antenna operates over 0.885GHz–0.962 GHz and 1.69GHz–3.8 GHz frequency bands with −6 dB impedance bandwidth that covers GSM900, GSM1800, GSM1900, UMTS, IMT2100, WLAN, WiMAX along with most of the higher LTE bands of modern mobile phone applications. The radiation characteristics of ...

Mobile phones signals are pulse-modulated microwaves, and EEG studies suggest that the extremely low-frequency (ELF) pulse modulation has sleep effects. However, 'talk', 'listen' and 'standby' modes differ in the ELF (2, 8, and 217Hz) spectral components and specific absorption rates, but no sleep study has differentiated these modes. We used a GSM900 mobile phone controlled by a base-station s...

Radio propagation prediction is one of the fundamentals of radio network planning. It is therefore vital that the propagation prediction models are as accurate as possible; taking into account the practical limitations that characterized the propagation environment. In this paper, the performance of Okumura – Hata Model, COST 231 – Hata Model, Standard Propagation Model and Stanford University ...

This paper reports on a low-cost low-temperature (≤150°C) laminate batch fabrication process for implementation of high-Q RF passive components (inductors and capacitors) in system-on-package (SOP) applications. Using this process, various designs of integrated inductors with Q-factors in the range of 60-180 for Bluetooth/IEEE 802.11b (2.4GHz), GSM1800 (1.8GHz) and GSM900 (900 MHz) communicatio...

In this article, compliance boundaries and allowed output powers are determined for the front, back, and side of multiple-frequency base station antennas, based on the root-mean-squared electric field, the whole-body averaged specific absorption rate (SAR), and the 10 g averaged SAR in both the limbs and the head and trunk. For this purpose, the basic restrictions and reference levels defined b...

The impact of mobile phone (MP) radiation on the brain is of specific interest to the scientific community and warrants investigations, as MP is held close to the head. Studies on humans and rodents revealed hazards MP radiation associated such as brain tumors, impairment in cognition, hearing etc. Melatonin (MT) is an important modulator of CNS functioning and is a neural antioxidant hormone. ...

Introduction:  The  use  of  mobile  communication  systems  has  dramatically  increased  over  the  past  decade. Although many studies have been performed to determine the effect of radio frequency (RF) but  less attention has been paid to the possible biological impact of exposure to extremely low frequency  (ELF) components.   The objective of this study is two folds. One is to design the ...

We propose a novel multifunctional reconfigurable antenna (MRA) design using micro/nanoelectromechanical system (M/NEMS) switches. This single MRA operates over five frequency bands of GSM900, GPS1575, GSM1800, PCS1900 and UMTS2100. The reconfigurability in operating frequency is achieved by the activation of M/NEMS switches which are integrated with the antenna architecture. Summary of Researc...