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Large amount of data are obtained from simulation or experimental activities. In most cases they are not of easy interpretation; factor analysis provides a tool to highlight those situations of major interest in EMC related to interaction mechanisms between electrical, geometrical and mechanical parameters. The case of field to cable coupling, a typical immunity problem, is presented to illustrate...
A transmission line model used to design a meander-line inverted F antenna (MIFA) at the frequency of 2.45 GHz, is showed in this paper. The antenna was obtained using a simple iterative method based on transmission line model which consider inductive or capacitive loadings adopted to quickly design the antenna. With reference to a meander antenna, this paper highlights the computational improvement...
To shield low-frequency magnetic field is necessary to surrounding the entire volume of interest with ferromagnetic metal barriers. However it is as much known that a good ferromagnetic material is more expensive especially with high permeability ferromagnetic material and also is very heavy. An adequate and cheaper possibility is the use of a multilayer screens. In this paper, we have investigated...
In the fields of electromagnetic interference and electromagnetic compatibility, it is important to measure the strength of the electric field originating from electric devices. For this purpose, knowledge of the antenna factor of a receiving antenna is necessary. In this paper, we discuss the recently measurement methods called Antenna Impedance Method as a new calibration method able to obtain the...
It is well known that the hyperthermia (HT) treatment method in cancer therapy makes use of the controlled electromagnetic heating in the patient's body. With regard to the deep body hyperthermia therapy, we have reviewed in this paper the most recent technology and technique of electromagnetic deep heating (Sigma-Eye applicator) based on annular phased arrays (APA) antennas. In order to improve the...
It is described the realization of a single sided scanner suitable for Nuclear Magnetic Resonance (NMR). A new design of a hand-size elliptical magnet, coil system and electronics is presented. First results demonstrate the possibility to measure relaxation times and diffusion coefficient in a small volume and open the possibility to use the prototype for in vivo skin studies. Possibility to extend...
This paper presents a transmission line model used to design an inverted F antenna (IFA) at the frequency of 2.45 GHz. This model provides a quickly design of a printed F antenna antenna that can be easily integrated into handheld devices or printed on PCMCIA cards for WLAN communications in the ISM band. A simple iterative method which consider inductive or capacitive loadings was adopted to design...
This paper introduces a new design to made RFID tags on metamaterial substrate. The metamaterial substrate has a potential to reduce the circuit size of the antenna as well as maintain the performance of the tag made on classical substrate. The behavior of the metamaterial substrate proposed was analysed in terms of S-parameters by commercial simulator to verify its negative permittivity. The simulation...
Recently composite right/left-handed (CRLH) leaky-wave antennas (LWAs) have been shown as one of the applications of the CRLH transmission line (TL) metamaterials thanks to their advantages of fabrication simplicity and frequency/electrically scanning capability without any complex feeding network. Neverthless the fixed geometrical size of a unit cell of the CRLH-TL Leaky-wave antennas, prevents the...
It is well known that the common strategy to shield low-frequency magnetic field is to surrounding the volume of interest with ferromagnetic metal barriers. However it is as much known that a good ferromagnetic material is more expensive especially with high permeability ferromagnetic material and also is very heavy. In this paper, we have investigated a simple way to design a multilayer shield obtained...
Nowadays valuable and efficient numerical methods allow an empirical approach in the design of antennas for high-frequency wireless communication systems. Generally these numerical techniques apply either time- or frequency-domain algorithms demanding high computational efforts and long-time processing. Moreover, the initially assumed geometrical configuration can strongly affect the numerical convergence...
The use of metal foam continues to grow in terms of research and application. Recently, new developments in the electromagnetic (EM) environment, such as shielding applications, have been proposed. A model of metal foam shielding is developed and discussed in this paper to characterize and simulate the EM shielding behavior. More specifically, the EM characterization has been considered, and experimental...
The use of metal foam continues to grow up in terms of research and application also in electromagnetic environment, such as shielding applications. Considering these new applications an analytical 3D model of metal foams (3D wire-mesh screens) is developed and discussed in this paper to characterize electromagnetic shielding behaviour. More specifically, the electromagnetic characterization has been...
In this paper a preliminary electromagnetic shielding behaviour of metal foams, is developed and discussed. Metal foams represent a novel class of materials which promise new interesting properties employable for various purposes. More specifically, the realization of electromagnetic shields has been considered and experimental Shielding Effectiveness (SE) measurements have been performed, demonstrating...
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