Sub-sectional Tapered Printed-LPDA Design with WLAN, WiMAX Notch Bands for UWB Communication Systems

This paper is focused on the design of a sub-sectional tapered printed Log periodic dipole antenna array (PLPDA) for UWB communication systems. This system explores a wide bandwidth of 7.5 GHz that includes two narrow frequency bands such as WiMAX (3.4–3.6 GHz) and WLAN (5.15–5.825 GHz), respectively. The WiMAX and WLAN bands are notched to suppress the interference with the UWB frequency band. A conventional UWB-PLPDA is first designed on a RO3003 (tm) substrate material with dielectric constant (er = 3) and height (h = 0.75 mm) using ANSYS HFSS. Surface current analysis is then used to create notches in the PLPDA at two different frequency bands. The lengths of dipole elements are tapered to create notches at the dual interfering frequency bands. The proposed UWB PLPDA can be used in short range wireless communication system, sensors like radars and short range motion sensing applications.