Giovani Bulla

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The Specific Absorption Rate (SAR) produced by mobile phones in the head of adults and children is simulated using an algorithm based on the Finite Difference Time Domain (FDTD) method. Realistic models of the child and adult head are used. The electromagnetic parameters are fitted to these models. Comparison also are made with the SAR calculated in the(More)
An applied technique of shorted pin at wide-band E-shaped patch antenna, fed through a coaxial probe, is described. The finite-difference time-domain (FDTD) method was used in the simulations. The posts are applied at full and half reduced E-antenna and the return losses simulations and measurements are presented.
Genetic Algorithm was used to optimize the ground plane shape of planar inverted F antenna (PIFA) on FR-4 substrate designed for broadband applications. The initial PIFA antenna design had 36% bandwidth and its central frequency was 2 GHz. Novel optimized antennas were presented. A relative bandwidth about 88 % was obtained with the optimized antenna. With(More)
The specific absorption rate (SAR) produced by mobile phones in the head of children is simulated using an algorithm based in the finite difference time domain (FDTD) method. A new model based on a 10 year old child computed tomographic images was used. The electromagnetic parameters were fitted to this age. The results are compared to the SAR calculated in(More)
Most of the communications in the century is accomplished through the wireless medium. There are various standards for simultaneous running of different applications. WLAN (Wireless Local Area Network) is a common wireless communication standard. Among the five bands announced by IEEE in 802. 11 standards for wireless LAN, two most common bands are 2. 4 GHz(More)
In this paper, we have proposed a novel passive ultra high frequency (UHF) radio frequency identification (RFID) metal tag antenna mountable on the metallic surface to resonate at 930 MHz. The techniques with double slits for impedance matching and reading distance enhancement is used to obtain a good performance. All simulations are carried out by Ansoft(More)
This paper shows the design of a novel compact Planar Inverted F antenna (PIFA) for Ultra-High Frequency (UHF) band passive radio frequency identification (RFID) tag. The antenna is designed to operate at 915 MHz frequency. Electromagnetic simulation commercial software (Ansoft HFSS) based on finite element method (FEM) was used to simulate the antenna(More)
Bandwidth and size optimisations of a single layer wide-band E-shaped patch antenna, fed through a coaxial probe are described. Maxwell equations are discretized and solved using the finite-difference time-domain (FDTD) method Simulations and measurements using capacitive feeding and shorting pins are presented. Using these techniques, the bandwidth can be(More)
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