Improving stop-band properties of frequency selective surfaces with Koch fractal elements

Author

Maniçoba, Robson H C ; Assunção, Adaildo G D ; Campos, Antonio L P S

Author_Institution

Dept. of Electr. Eng., Fed. Univ. of Rio Grande do Norte, Natal, Brazil

fYear

2010

fDate

1-3 March 2010

Firstpage

1

Lastpage

4

Abstract

Design and experimental investigations are presented for a cascaded frequency selective surface (FSS) with perfectly conducting Koch fractal patch elements. The work was developed in two steps. In the first step two Koch fractal FSS screens were designed using the software Ansoft Design^Â¿ and several prototypes were built. In the second step these FSS screens were cascaded and separated by an air gap layer to improve the bandwidth behaviour. The structures are cascaded using Teflon spacers and screws to obtain the air gap. The FSSs were built on a RT-Duroid 3010 substrate. Good agreement was observed between simulated and measured results.

Keywords

fractal antennas; frequency selective surfaces; microstrip antennas; Ansoft design; Koch fractal elements; RT-Duroid 3010 substrate; Teflon spacer; air gap; cascaded frequency selective surface; perfectly conducting Koch fractal patch element; stop band property; Bandwidth; Dielectric substrates; Fractals; Frequency response; Frequency selective surfaces; Geometry; Periodic structures; Resonance; Software design; Software prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology (iWAT), 2010 International Workshop on

Conference_Location

Lisbon

Print_ISBN

978-1-4244-4883-8

Electronic_ISBN

978-1-4244-4885-2

Type

conf

DOI

10.1109/IWAT.2010.5464643

Filename

5464643