Title :
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
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¿ 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;
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
DOI :
10.1109/IWAT.2010.5464643
