Science & Engineering Research Support soCiety (SERSC)
In this paper, the authors study parametrically the impedance and radiation characteristics of a Vivaldi antenna. Usually, the performance of Vivaldi is sensitive to the parameters, the effects of major geometry parameters of the radiators and feeding transition on antenna performance are investigated across the frequency range of 3.1 to 10.6GHz. The Vivaldi elements are fed by broadband microstrip-to-slot line baluns. A 2:1 bandwidth (3.4 to 7GHz) was achieved for VSWR, gain and cross-polarization isolation. The design iteration and simulations results are presented.