Investigation of thick coax-to-waveguide transitions

Abstract

Thick transitions from coaxial transmission lines to rectangular waveguides are proposed. The coaxial SMA connector enters into the broad wall of the waveguide and continues to the bottom of the waveguide. Two types of transitions are described in the S-band with 40% bandwidth: the first type is based on a polygonal shape and the second type is based on a curved elliptical cylinder. Very good agreement between simulations and measurements was achieved.