Showing papers by "Anthony Ghiotto published in 2006"
09 Jul 2006
TL;DR: A novel printed antenna is proposed for radio frequency identification that has a much wider bandwidth than known printed antenna, mostly planar antennas and much smaller than a printed dipole antenna at the same frequency band.
Abstract: A novel printed antenna is proposed for radio frequency identification. The antenna has a much wider bandwidth than known printed antenna, mostly planar antennas. The antenna geometry is much smaller than a printed dipole antenna at the same frequency band. The method of design and realization with experimental results is shown. The introduction includes basic concepts of RFID systems. The second part addresses the main characteristics of the proposed RFID tag antenna. The third part introduces a comparison between measurements and simulations. Few advantages of the proposed RFID tag that meets the objectives of low-cost and size reduction are presented in part four.
18 citations
Proceedings Article•
16 Jul 2006
TL;DR: In this paper, a quasi-isotropic antenna was proposed to generate an isotropic radiation pattern in the three dimension plane (xy, yz and xz) with a very closed uniform distribution.
Abstract: In this paper we propose a new geometry to generate an isotropic radiation pattern. Derivate from the classical half-wave dipole, the radiation pattern in the three dimension plane (xy, yz and xz) has a very closed uniform distribution. The axial ratio in each one of the three planes is near to one for the proposal dipole shape. The new geometry allows the development of compact measurement systems. The new quasi-isotropic antenna radiate the electric field with linear polarization in the three principals axis. The experimental results have good agreement with the simulated ones, that were obtained with the help of the CST-Microwave Studio.
7 citations
Proceedings Article•
01 Jul 2006
TL;DR: In this article, two modified models of Koch fractal dipoles are compared to the standard bi-band Koch-fractal dipole antenna for UHF operations at UHF frequencies (868MHz and 2.45GHz).
Abstract: In this paper Koch fractal antennas for bi-band operations at UHF frequencies (868MHz and 2.45GHz) are analyzed. In particular, two modified models of Koch fractal dipoles are compared to the standard bi-band Koch fractal dipole antenna. The goal is to reduce the size of the fractal antenna while still providing good gain and allow operation at multi-frequencies. A size reduction of 8% with respect to the standard Koch antenna is obtained, by using a new set of fractal antenna. The standard and the modified fractal Koch antennas are printed on glass-epoxy FR-4 substrate having a thickness of 1.6 mm and a relative permittivity of 4.4. The return loss parameter and radiation properties of the fabricated antennas are measured and compared with simulation results.
4 citations
Proceedings Article•
16 Jul 2006
TL;DR: In this paper, the design and measurement of the requirement standards of the IEC610004-21, over a compact electromagnetic reverberation chamber are presented, where the immunity tests may be made in an anechoic chamber, it's more laborious, takes a longer operation time, needs a high power amplifier and presents a high cost experiment.
Abstract: In this paper, the design and measurement of the requirement standards of the IEC610004-21, over a compact electromagnetic reverberation chamber are presented. Although the immunity tests may be made in an anechoic chamber, it's more laborious, takes a longer operation time, needs a high power amplifier and present a high cost experiment. On the other hand, a reverberation chamber is presented as a low cost measurement site which simultaneously provides all kind of emission polarization, increasing the tests speed.
3 citations
01 Nov 2006
TL;DR: In this article, a new technique was proposed to adapt the input impedance of the Koch model to be matching with the impedance of RFID chip, which conserves the same special form of the bi-band Koch dipole model.
Abstract: In this paper the Koch fractal antenna at UHF frequency will be analyzed In particular, a new technique proposed to adapt the input impedance of the Koch model to be matching with the impedance of the RFID chip It is important to remark that the proposed technique conserves the same special form of the bi-band Koch dipole model The Bi-band fractal antenna with input impedance 50 ohms is compared to the new design proposed to be used as a tag RFID Fractal antennas can obtain both input impedance and radiation pattern similar to a longer antenna, yet take less special area due to the many contours of shape The fractal antennas (with input impedance equal to 50 ohms) are printed on glass-epoxy FR-4 substrate of thickness 16 mm and relative permittivity 44 Fractal antennas are a fairly new research area and are likely to have a promising future in RFID applications
3 citations
Proceedings Article•
09 Jul 2006
TL;DR: In this paper, a novel printed antenna is proposed for radio frequency identification, which has a much wider bandwidth than known printed antenna, mostly planar antennas, and the antenna geometry is much smaller than a printed dipole antenna at the same frequency band.
Abstract: A novel printed antenna is proposed for radio frequency identification. The antenna has a much wider bandwidth than known printed antenna, mostly planar antennas. The antenna geometry is much smaller than a printed dipole antenna at the same frequency band. The method of design and realization with experimental results is shown. The introduction includes basic concepts of RFID systems. The second part addresses the main characteristics of the proposed RFID tag antenna. The third part introduces a comparison between measurements and simulations. Few advantages of the proposed RFID tag that meets the objectives of low-cost and size reduction are presented in part four
1 citations