Reduction of active elements in agile EBG antennas using their second band-gap

In this paper, a new design method of CEBG antennas has been proposed for reducing the required number of active elements and power supply in agile CEBG antennas. The proposed technique consists of using a continuous-metallic-rod structure in its second bandgap and in passband of discontinuous rods. Numerical simulations have been presented to validate the proposed concept. An antenna operating from 5.4 to 5.95 GHz has been designed. Good impedance matching and directivity have been achieved. It has been shown that the proposed technique allows reducing the number of active elements and power supply by more than 50%.