Perturbed Sierpinski multiband fractal antenna with improved feeding technique

Author

Song, C.T.P. ; Hall, Peter S. ; Ghafouri-Shiraz, H.

Author_Institution

Sch. of Electron. & Electr. Eng., Univ. of Birmingham, UK

Volume

51

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1011

Lastpage

1017

Abstract

This paper describes the multiband behavior of a series of perturbed fractal Sierpinski gasket antennas. Sierpinski gaskets, with periodic ratios of 0.5, 0.65, and 0.75 were fabricated and tested. Two methods are presented that improve the inherently poor input impedance match of the antenna with a 50 Ω port. Theoretical simulation is used to give an insight into the field distribution of the antenna as the perturbing ratio varies. Different properties and merits of the antenna due to perturbation were noted. These improved feeding methods will allow further flexibility to the application of these multiband antennas.

Keywords

antenna feeds; antenna radiation patterns; fractals; impedance matching; monopole antennas; multifrequency antennas; 50 ohm; field distribution; ground plane; improved feeding methods; input impedance matching; measured radiation patterns; microstrip feed technique; periodic ratios; perturbed Sierpinski gasket monopole; perturbed Sierpinski multiband fractal antenna; perturbed fractal Sierpinski gasket antennas; perturbing ratio; simulation; Antenna feeds; Antenna theory; Electromagnetics; Fractal antennas; Gaskets; Geometry; Impedance matching; Multifrequency antennas; Resonance; Testing;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.811522

Filename

1208506