S. H. Ronald

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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(More)
In this paper, a dipole antenna operating at 900 MHz is simulated to examine the most suitable simple geometrical head phantoms for specific absorption rate (SAR) simulations and measurements. The numerical analysis was performed using finite integration in time domain technique (FIT). Illumination of a frontal dipole source representing mobile(More)
In this paper, 2.45 GHz small printed antenna suitable for WLAN-band application are proposed. In order to decrease the size of the antenna, multi-layer substrate and shorting pin method are used. Partial and slitted ground methods are used to increase the impedance bandwidth of the antenna. This antenna shows an omni-directional radiation pattern similar(More)
A simple block hand model with the size of an adult Malaysian hand is suggested to substitute the existing hand phantom of European size. The hand is set up with a Standard Anthropomorphic Mannequin (SAM) head and a candy bar mobile phone operating at GSM900/1800 using Planar Inverted-F antenna (PIFA). Both hands use the same dielectric properties of CTIA(More)
In this paper, a very small 2.45 GHz printed antenna suitable for WLAN application is proposed. In order to decrease the size of the antenna, multi-layer substrate and shorting plate method are used. A microstrip line which can lead to a good impedance matching and four pairs of slot are used to obtain acceptable value of return loss at the desired(More)
In this paper, the Specific Absorption Rate (SAR) inside the head due to metallic spectacle is investigated. Computer simulation using CST Microwave Studio is used in this investigation. A dipole antenna operated at 900MHz for GSM application is used in the simulation model represent as a radiation source from mobile phone. In parametric studies the maximum(More)
A candy bar mobile phone with Planar Inverted-F Antenna (PIFA) operating at 900 MHz and 1800 MHz is simulated with two models of quasi-block hand — homogeneous and inhomogeneous. Maximum Specific Absorption Rate (SAR) is investigated by using Standard Anthropomorphic Model (SAM) hand phantom properties in comparison with the properties of human skin(More)
In this paper, the study of shell and body tissue simulating liquid (BTSL) effects on compact peanut-shape antenna performance that operate at frequency 2.45 GHz are presented. Two simulation setups which consist of eight different types of simulation were used in the simulation process. Reflection coefficient, bandwidth, radiation pattern and directivity(More)
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(More)
In this paper, the study of shell and body tissue simulating liquid (BTSL) thickness and its effects on capsule antenna performance at 2.45 GHz were presented. Two simulation setups which consists two different sets of shell and BTSL position near the capsule antenna were used in the simulation process. The reflection coefficient, directivity, gain and(More)
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