B8. High-Gain Slotted Oversize Patch Antennas with Electromagnetic Bandgap Structure

A method of improving the radiation characteristics of the slotted oversize patch antennas using electromagnetic bandgap (EBG) rows is presented. The proposed antenna is designed for low loss, high gain and low cross-polarization at far field applications. It is composed of a coaxial probe driven oversize slotted patch, backed by a metallic ground plane. Two mushroom EBG rows are introduced around the slotted patch antenna. By using these EBG layers, both gain and sidelobe levels (SLL) are improved. The realized gain is increased by almost 2 dB while the SLL is reduced by 3 dB in E-plane and 9 dB in H-plane.