Numerical study of Chebyshev tapered transmission line TEM horn antenna

An Chebyshev tapered transmission line TEM horn antenna is designed, and the working principle, impedance characteristics, transmission characteristics and radiation characteristics are studied based on numerical simulation. Compared to conventional linear TEM horn antenna, the Chebyshev tapered transmission line TEM horn antenna has lower reflection, wider band and higher radiation efficiency. The wider the input pulse is, the better performance the antenna has. The effect of maximal reflection coefficient on radiation performance of antenna is analysed. The results show that if the input pulse is narrow, we should select the larger reflection coefficient antenna.