Design and Analysis of the 6~8 GHz Ultra Wideband Antenna

A Leaf-like dipole printed on the finite Polytetrafluoroethylene plane with an operating frequency band of 6~8GHz is presented in this paper.The impedance characteristics and radiation field distribution characteristics are studied,by means of the finite difference time domain(FDTD) method combined with the perfect matched layer(PML) technique.Numerical results indicate that,when the 50 Ω feeding line is connected,the VSWR value is less than 1.6 in the main frequency band and the radiation pattern shows stable characteristics at several different frequency points.The proposed antenna has a wide-band frequency-domain response,and behaves well in the time domain as well,so this sort of antenna is adequate for the UWB system.