Design of a two-element folded-Yagi antenna with super-directivity

This paper presents a new design of the Yagi antenna with a super-directivity of 8.9dBi. The Yagi antenna has two folded elements; one is a fed element and the other is a parasitic element. Except the high directivity, this antenna also shows quite good input impedance and return loss performance at the working frequency of 300MHz. The 10dB fractional bandwidth is only about 1.3%, which restricts it to be narrow band application.