Study of dielectric substrate effect on modelling CPW-fed slot antenna arrays

Coplanar waveguide (CPW) fed slot antennas are attractive due to fabrication simplicity and ease of integration with active devices. In this paper, the modelling a CPW-fed slot antenna arrays with different dielectric substrates is presented. The examined antenna array consists of 14 CPW-fed slots of rectangular shape that are placed at uniform distance λ
_g
. The impedance transformer is used to convert array's impedance into 50Ω impedance. The plane reflectors plate, with dimension same as array's dimensions, is placed at distance λ
₀
/4 from slots. The center frequency of all examined antenna arrays is 17.1 GHz. Presented simulated results show how dielectric constant and height of substrate influence radiation pattern of proposed antenna array.