A Broad-Band Conductively-Loaded Slot Antenna for Pulse Radiation

A slot antenna with a conductive loading profile, which is complementary to the dipole antenna with the Wu-King resistive profile, is derived based on a transmission line model. The drive point impedance of the nonreflecting slot antenna is determined using Babinet's principle. The voltage distribution along the slot arms is shown to be an outward traveling wave with no internal reflection. In addition, the radiated electric field pattern and the efficiency of the nonreflecting slot antenna are discussed. The complementary nature between the Wu-King dipole and nonreflecting slot is numerically verified. The pulse radiation and reception characteristics of the antenna are then demonstrated both numerically and experimentally.