A dual band gap slotted patch electromagnetic band gap for dual band microstrip antenna

This paper described the design of the dual band gap slotted patch EBG structure. By introducing double L slot into each EBG patch, a smaller rectangular patch has been introduced in each EBG patch resulting to the achievement of the second stop band frequency. The comparison between mushroom EBG structures has been investigated. The parametric study has been done involve the analysis of patch width effect of EBG and gap effects between elements in the EBG. The operating frequencies are 2.4 GHz ISM and 5.8 GHz UNI band. The slotted patch EBG structure and mushroom EBG structure have been simulated by using 3D simulation CST software. The design is based on FR4 board with has relative permittivity 4.7 and tangent loss 0.019.