Abstract:
This thesis presents the efficiency improvement of broadband CPW-Fed equilateral hexagonal slot antenna structure , by using two tuning types : (1) Strip and Slit technique and (2) Electromagnetic Band Gap technique. The analysis of antenna structure is simulated by IE3D program. Proposed antenna is designed to have the matches impedance at 50 ohms, for broad band wireless communication network application.
First experiment, the proposed antenna has been efficiency adapted by strip and slit technique. The bandwidth at resonance frequency is about 132.3% (1.676 - 8.224 GHz).
The Electromagnetic Band Gap (EBG) technique has been applied to proposed antenna for bandwidth improvement . The EGB structure is rectangular sharp and posited above ground plane.
The characteristics of the EBG can improve the bandwidth and reflection coefficient.
The measurement bandwidth of proposed antenna is about 148.66% (1.676 - 8.224 GHz).
The application of proposed antenna use for DCS, PCS, UMTS, WLAN, IEEE802.11 a/b/g Bluetooth and IEEE802.16 WiMAX applications. The simulated bandwidth and radiation pattern of prototype antenna are agreed with the measured results.