CAD of a compact monopulse comparator network using planar magic tee junctions for airborne slotted array antennas

The operating principle and design of compact, non-standard, reduces height waveguide planar magic tee junctions are described. The distinguishing fea ture of these components is the placement of the difference port on layer s eparated from other three ports by a common waveguide broadwall. the two pa rts of the component are coupled through a slot located in the common broad wall of two. A design methodology making use of extensive electromagnetic m odelling based on methods of moment (MoM) analysis and finite element metho d (FEM)-based commercial software has been developed. The use of such plana r magic tee junctions in developing planar monopulse comparators for airbor ne slotted array application has been demonstrated.