Design of a Dual-Band, Compact Yagi Antenna Over an EBG Ground Plane

A two-element, closely spaced, compact Yagi antenna over an electromagnetic bandgap (EBG) ground plane was designed to provide dual bands. The lower band is generated by the driver element of the Yagi over the EBG ground plane out of the reflection phase band (driver mode). The higher band is attained due to the overall Yagi over the EBG ground plane in the reflection phase band (Yagi mode). The measured realized gains toward the director direction in the driver and Yagi modes are 6.6 and 8.0 dB, respectively.