Broadband E-shaped space-fed array with stacked E-shaped microstrip antenna array feed

Broadband Spaced fed array fed using stacked configuration of E-shaped microstrip antenna fed by E-shaped microstrip antenna is proposed. The modified feeding structure in space fed array is used as in higher order arrays, peripheral patches are not equally fed using single microstrip patch. The fed 3 × 3 stacked E-shaped patch array yields an optimum gain of nearly 9 dBi with VSWR bandwidth of around 2.1 GHz. The 3 × 3 stacked array is then used as a feed element for the space fed array variations. Various spaced fed array configurations of the stacked microstrip array, like 1 × 3, 3 × 1, plus shaped and 3 × 3 arrays are studied. An optimum result is obtained in 3 × 3 space-fed array configuration showing a gain of nearly 16 dBi with bandwidth of 2.1 GHz.