부산대학교 도서관

In this paper, implementations of two modified six-element Yagi-Uda arrays are discussed. Firstly, in contrast to the dipole resonator, the folded dipole resonator is used to improve the frequency responses. Secondly, two types of folded Yagi-Uda arrays are fabricated, one is the original array with uniform length and spacing, the other is the optimum array with perturbed length and spacing to obtain a higher directivity gain. This study shows the band of 500~600MHz can be used in digital TV receivers for the broadcasting applications. Frequency responses and radiation patterns are presented and discussed in this paper.