Antipodal linearly tapered slot antenna system using substrate parallel plate waveguide feeding structure

An antipodal linearly tapered slot antenna (LTSA) structure fed by substrate parallel-plate waveguide is presented in this paper. First, propagation constant of the substrate parallel plate waveguide is analyzed by full-wave software CST. The simulated results show that this waveguide support TEM mode. Second, an LTSA element fed by our proposed parallel plate waveguide is designed, fabricated and measured. A very wide bandwidth is shown on the basis of the simulated and measured results.