2024-03-28T18:11:39Z
http://eprints.biblio.unitn.it/cgi/oai2
oai:eprints.biblio.unitn.it:817
2012-02-28T14:18:15Z
7374617475733D696E7072657373
7375626A656374733D51:5143:5143353031
7375626A656374733D51:5143:5143373630
74797065733D746563687265706F7274
Design of a Miniaturized Ism-Band Fractal Antenna
Azaro, Renzo
Boato, Giulia
Donelli, Massimo
Franceschini, Gabriele
Martini, Anna
Massa, Andrea
QC501 Electricity
QC760 Electromagnetism
Miniaturization techniques for antenna design based on fractal geometries are of growing interest in wireless communications. In this letter, the design of a miniaturized fractal antenna prototype is described. Towards this end, a particle swarm optimizer is used to simultaneously optimize the fractal shape as wll as the input impedance by acting on the thickness of the antenna segments to avoid matching networks. The effectiveness of the approach is confirmed by means of simulated as well as experimental results
2005-06
Departmental Technical Report
PeerReviewed
application/pdf
http://eprints.biblio.unitn.it/817/1/DIT%2D05%2D009.pdf
Azaro, Renzo and Boato, Giulia and Donelli, Massimo and Franceschini, Gabriele and Martini, Anna and Massa, Andrea (2005) Design of a Miniaturized Ism-Band Fractal Antenna. UNSPECIFIED. (In Press)
http://eprints.biblio.unitn.it/817/
oai:eprints.biblio.unitn.it:892
2012-02-28T14:18:40Z
7374617475733D7375626D6974746564
7375626A656374733D51:5143:5143363631
7375626A656374733D51:5143:5143353031
7375626A656374733D51:5141:51413735
7375626A656374733D51:5143:5143373630
74797065733D746563687265706F7274
Design of a Pre-Fractal Monopolar Antenna for 3.4 - 3.6 GHz Wi-Max Band Portable Devices
Azaro, Renzo
Boato, Giulia
Donelli, Massimo
Massa, Andrea
Zeni, Edoardo
QC661 Electromagnetic Theory
QC501 Electricity
QC760 Electromagnetism
QA075 Electronic computers. Computer science
In this letter, the design of a miniaturized monopolar pre-fractal antenna for the 3.4 - 3.6 GHz Wi-Max band is presented. The geometrical configuration of the monopolar antenna, printed on a planar dielectric substratum, has been synthesized by means of a Particle Swarm Optimizer in order to minimize the linear dimensions of the device and to obtain Voltage Standing Wave Ratio values within specifications. The results of numerical simulations are shown and compared, in terms of VSWR, with the experimental measurements.
2005-08
Departmental Technical Report
PeerReviewed
application/pdf
http://eprints.biblio.unitn.it/892/1/DIT%2D05%2D057.pdf
Azaro, Renzo and Boato, Giulia and Donelli, Massimo and Massa, Andrea and Zeni, Edoardo (2005) Design of a Pre-Fractal Monopolar Antenna for 3.4 - 3.6 GHz Wi-Max Band Portable Devices. UNSPECIFIED. (Submitted)
http://eprints.biblio.unitn.it/892/
oai:eprints.biblio.unitn.it:1094
2012-02-28T14:19:27Z
7374617475733D696E7072657373
7375626A656374733D51:5143:5143363631
7375626A656374733D51:5143:5143353031
7375626A656374733D54:544B:544B353130352E35
7375626A656374733D51:5141:51413735
7375626A656374733D51:5143:5143373630
7375626A656374733D51:5143:5143303230
7375626A656374733D51:5143:51433130302E35
74797065733D746563687265706F7274
Synthesis of a Three-Dimensional Triband (L1-L2 GPS and Wi-Fi) Prefractal Tree Antenna
Azaro, Renzo
Zeni, Edoardo
Gazzini, Tommaso
Dallapiccola, Ramona
Massa, Andrea
QC661 Electromagnetic Theory
TK5105.5 Computer Networks
QC501 Electricity
QC760 Electromagnetism
QA075 Electronic computers. Computer science
QC020 Mathematical Physics
QC100.5 Measuring Instruments
In this letter, the synthesis of a 3D wire antenna with a tree-like shape and operating at three different frequency bands (L1-L2 GPS bands and Wi-Fi) is presented. The Geometrical parameters of the antenna are determined by means of a particle swarm-based optimization procedure exploiting the degrees of freedom of the reference tree geometry for fitting the electrical project costraints. The results of the numerical simulation are shown and compared with those for experimental measurements for assessing the effectiveness of the synthesis procedure.
2006-11
Departmental Technical Report
PeerReviewed
application/pdf
http://eprints.biblio.unitn.it/1094/1/DIT%2D06%2D068.pdf
Azaro, Renzo and Zeni, Edoardo and Gazzini, Tommaso and Dallapiccola, Ramona and Massa, Andrea (2006) Synthesis of a Three-Dimensional Triband (L1-L2 GPS and Wi-Fi) Prefractal Tree Antenna. UNSPECIFIED. (In Press)
http://eprints.biblio.unitn.it/1094/
oai:eprints.biblio.unitn.it:1403
2012-02-28T14:21:36Z
7374617475733D7375626D6974746564
7375626A656374733D54:5453
7375626A656374733D51:5143:5143373630
7375626A656374733D51:5141:51413736
7375626A656374733D54:544B:544B37383835
7375626A656374733D51:5143:5143363631
7375626A656374733D51:5143:5143353031
7375626A656374733D51:5141:51413735
7375626A656374733D54:5431:5435352E34
7375626A656374733D51:5143:5143303230
7375626A656374733D51:5141:5141303633
7375626A656374733D54:5441:5441333239
74797065733D746563687265706F7274
A hybrid prefractal three-band antenna for multistandard mobile wireless applications
Azaro, Renzo
Debiasi, Luca
Zeni, Edoardo
Benedetti, Manuel
Rocca, Paolo
Massa, Andrea
TS Manufactures
QC760 Electromagnetism
QA076 Computer software
TK7885 Computer Engineering
QC661 Electromagnetic Theory
QC501 Electricity
QA075 Electronic computers. Computer science
T055.4 Industrial Engineering
TA329 Engineering mathematics
QA063 Problem solving
QC020 Mathematical Physics
In this letter, the synthesis of a miniaturized threeband planar antenna working in GSM and WiFi frequency bands is described. The reference geometry for the synthesis of the antenna is a hybrid prefractal shape obtained by integrating a Sierpinski-like and a Meander-like structure. The synthesis of the geometrical parameters of the antenna has been performed by means of a customized Particle Swarm strategy to yield electrical parameters within given specifications. In order to show the effectiveness of the approach, some results from the numerical synthesis procedure are described and a comparison between simulations and experimental measurements is reported.
2008-03
Departmental Technical Report
NonPeerReviewed
application/pdf
http://eprints.biblio.unitn.it/1403/1/DISI%2D08%2D015.pdf
Azaro, Renzo and Debiasi, Luca and Zeni, Edoardo and Benedetti, Manuel and Rocca, Paolo and Massa, Andrea (2008) A hybrid prefractal three-band antenna for multistandard mobile wireless applications. UNSPECIFIED. (Submitted)
http://eprints.biblio.unitn.it/1403/
oai:eprints.biblio.unitn.it:1443
2012-02-28T14:21:51Z
7374617475733D756E707562
7375626A656374733D51:5143:5143353031
74797065733D746563687265706F7274
A formulation of the eddy-current problem in the presence of electric ports
Alonso Rodriguez, Ana
Valli, Alberto
Vazquez Hernandez, Rafael
QC501 Electricity
The time-harmonic eddy current problem with either voltage or current intensity excitation is considered. We propose and analyze a new finite element approximation of the problem, based on a weak formulation where the main unknowns are the electric field in the conductor, a scalar magnetic potential in the insulator and, for the voltage excitation problem, the current intensity. The finite element approximation uses edge elements for the electric field and nodal elements for the scalar magnetic potential, and an optimal error estimate is proved. Some numerical results illustrating the performance of the method are also presented.
2008-04
Departmental Technical Report
NonPeerReviewed
application/pdf
http://eprints.biblio.unitn.it/1443/1/UTM720.pdf
Alonso Rodriguez, Ana and Valli, Alberto and Vazquez Hernandez, Rafael (2008) A formulation of the eddy-current problem in the presence of electric ports. UNSPECIFIED. (Unpublished)
http://eprints.biblio.unitn.it/1443/