A Simple Frequency Selective Surface Based Reflector for UWB Applications

The paper introduces a new simple type of frequency selective surface (FSS) which is made up of a square loop with a plus shaped metallic structure on the top side of the substrate and a square loop structure on the bottom side of the substrate. The proposed FSS provides very wide transmission bandwidth i.e., S21 < -10dB from 5 GHz-14.2 GHz and the size of the unit cell is 0.16λ
o
x 0.16λ
o
x 0.013 λ
o
where λ
o
is the wavelength corresponding to the lowest operating frequency. The proposed FSS provides polarization stability as well as reasonable angular stability. The transmission line modelling has also been provided. The parametric optimization for different parameters has also been provided. The proposed FSS can be used as a reflector for C, X and Ku (partial) band applications.