Characterization of the koch fractal hexagonal loop frequency selective surface for X-band application

Nur Biha Binti Mohamed Nafis (Universiti Teknologi Malaysia)
Mohamad Kamal Bin A. Rahim (Universiti Teknologi Malaysia)
Osman Bin Ayop (Universiti Teknologi Malaysia)
Huda Bin A MAjid (Universiti Tun Hussein Onn)
Sunti Tuntrakool (King Mongkut's Institute of Technology Ladkrabang)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 20, No 2: November 2020

This paper presented the bandstop Koch fractal hexagonal loop frequency selective surface (FSS) for the X-band application. The simulated transmission coefficient response (S_21) had been obtained by using CST software. The proposed Koch fractal hexagonal loop FSS structure is highly insensitive towards angular stability and also incident polarization up to 60 degree , with deviation of resonant frequency,  f_r below than 1%. The parametric analysis on the effect of the periodicity, width, and height of the fractal FSS structure on the S_21 has been illustrated and discussed thoroughly.