Broadband design of U-shaped folded dipole antenna for WiMAX by using characteristic mode analysis

Abstract

In this study, we utilize an effective method called Characteristic Mode Analysis (CMA) to analyze the physical mechanisms of U-shaped Folded Dipole Antenna (UFDA), which have been proposed for WiMAX device. The proposed antenna consists of the UFDA element and small Ground Plane. As a result, it is confirmed that two types of modes in the resonance of UFDA appear, the one is the mode of the Ground Plane and the other is the mode of the UFDA element. Subsequently, from these results, an easier method for broadband design of UFDA which can cover completely two frequency bands of WiMAX was investigated.