E-band “T” shape transitions between substrate integrated waveguide and standard waveguide

In this paper "T" shape transitions between the air-filled standard waveguide and SIW were introduced. This kind of transition is actually an E-plane T junction, which have the functions of a transition from the standard waveguide to SIW as well as a power divider. One specific application of this type transition is to connect the standard waveguide to a slotted waveguide array antenna or SlW-fed slot array antenna with symmetrical power distribution.