Abstract
This paper presents an engineered magneto-dielectric superstrates designed to enhance the gain and efficiency of a microstrip antenna array without any substantial increase in the antenna profile. The broadside coupled split ring resonator (SR.R.) inclusions are used in the design of the superstrate. Numerical full-wave simulations of a 4 x 1 linear microstrip antenna array working at the resonance frequency of 2.18 GHz and covered by the superstrate show a gain enhancement of about 3.5 dB and an efficiency improvement of 10%. The total height of the proposed structure, is lambda(0)/7 where lambda(0) is the free-space operating wavelength.