A high-efficiency planar series-fed array antenna based on thick EBG resonator elements

An efficient planar array antenna composed of thick electromagnetic bandgap (EBG) antenna elements is proposed. The element, called SE-EBG-RA, is an efficient EBG antenna introduced in literature. The array comprises equally-spaced series-fed elements designed to have broadside radiation. A computationally efficient approach is presented to form the array in series with negligible mutual coupling between elements. To this end, first the terminated version of SE-EBG-RA element is introduced. Then, it is shown that how such elements can structure the series array effectively. Results show that the application of EBG cells and thick traces yields high efficiency, alleviated mutual coupling, and a symmetrical broadside pattern with reduced numerical computation load.