Abstract-A simple geometrical Asian-hand model with human tissue properties posed at two common talk-mode positions is proposed for comparative study. The newly designed hand is formed by measuring an adult female hand at open-hand position before being posed into the presented styles. Four human hand tissues are included: skin, bone, muscle, and tendon, and also three homogeneous sets of hands using specific anthropomorphic mannequin (SAM) hand phantom dielectric properties. A candy-bar type mobile phone with Planar Inverted-F Antenna (PIFA) is used to radiate dual-band frequency of GSM900/1800 in the vicinity of the SAM head phantom. The mobile phone casing is made out of plastic, and only two components are considered: the FR-4 ground plane and PIFA. The specific absorption rate (SAR) averaged over a mass of 10 gram and 1 gram is calculated after obtaining the power loss density and electric field value from simulation in CST Studio Suite 2011. The SAR and return loss results of six hand structures, including the SAM hand phantom are compared. The antenna performance with the inclusion of hand does not decrease as much as 1800 MHz in 900 MHz range, but absorbs energy more in the hands for 1800 MHz than 900 MHz SAR values.

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This paper presents an equilateral triangular microstrip antenna with spur lines. The proposed antenna, comprising a triangular planar patch element embedded with two spur line slots. The simulation and fabrication process are performed to understand the characteristics of the proposed antenna. The simulation result is compared with the fabricated antenna. The targeting frequency of this antenna is 0.90 GHz (first resonant frequency) and 1.80 GHz (second resonant frequency). The proposed antenna can improve the bandwidth of GSM 1800 up to 100 MHz. It shows the return loss of -16.176 dB, bandwidth of 33 MHz (0.919 GHz to 0.952 GHz) and a gain of 3.52 dB first resonant frequency. At second frequency, the return loss are -28.159 dB with a bandwidth of 115 MHz (1.714 GHz to 1.829 GHz) and gain of 3.380 dB.

The investigation on the changes of Specific Absorption Rate (SAR) inside the head due to metallic straight pin with simple braces added is presented in this paper. The finite integration in time domain (FIT) computer simulation technique was used in this investigation. The head is irradiated by dipole sources in front of the Specific Anthropomorphic Mannequin (SAM) face. Parametric studies show that 1 gram SAR at 900MHz is slightly reduced. However at 1800MHz, it decreased if pin lengths were varied longer than dipole and it can increase if pin is shorter or both has the same length. I. INTRODUCTIONNowadays, with more open source for mobile applications listed in market and larger screens, mobile communication equipment (MCE) used in frontal of the face has been increasing significantly. Numerous studies have examined the interaction between the electromagnetic fields radiated by the antenna that may also couples with metallic objects and the results seem to suggest that metallic objects could increase the SAR [1]- [4]. Whittow [4], found metallic braces modelled with closed mouth could double the 1g and 10g SAR. In this current paper, a straight metallic pin near the eye representing a metallic spectacle employed together with another two straight metallic pins near to the mouth as a simple geometrical representation of the orthodontist braces. The electric field distribution within the head (without braces) is simulated and compared with the cases when the braces are worn and are visible while talking (open mouth). The authors present results from a study of the effects of SAR from a single metallic pin compared with a pair of metallic braces added to the mouth illuminated by RF sources (900MHz and 1800MHz).

shaped Antenna (PIFA) evaluations and measurements in an intestine phantom. Take-Home Messages This paper systematically presents the design, simulation, and evaluation of an in-body planar inverted-F antenna (PIFA) with good compactness, design simplicity and satisfactory impedance matching for application in biotelemetry.  Comprehensive simulation and experimental examination of the antenna's wireless link performance and specific absorption rate (SAR) assessments indicating satisfactory operation/levels between an in-body antenna and an on-body antenna.  Proposal of phantom models, simulation, and experimental procedure for the evaluation of antenna's wireless link and SAR using a commercial system for in-body antenna wireless link evaluations.

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In this paper, 2.45 GHz compact peanut-shape antenna suitable for bio-telemetric tablet system is proposed. In order to make a compact antenna, multi-layer substrate and shorting pin method are used. The specific absorption rates (SAR), antenna performance in the tablet and near to human tissue model also have been investigated. The antenna shows an omni-directional radiation pattern similar to that of monopole antenna.