Efficient design of Substrate Integrated Waveguide power dividers for antenna feed systems

An efficient design technique for Substrate Integrated Waveguide (SIW) power dividers for applications in SIW antenna feed networks is presented. The analysis and optimization procedure employs mode-matching techniques using square via holes. A simple square-to-circular via hole conversion produces the final power dividers with only very little performance discrepancy between the components with square and circular via holes. Five power divider designs for K-band applications, ranging from two-way to four-way dividers, are presented and validated by commercial field solvers. Good agreement with measurements is demonstrated for a Ka-band two-way divider.