Optimized microwave multiport beam-forming circuit design for wide band applications'

This paper presents a practical modeling methodology for wide-band microwave applications on curved surfaces that focuses on the design of the beam-forming network playing a role similar to that of multiport power combiners/splitters. The beam-forming network was developed to provide equal electrical paths from the radiators to the common power receiver. While multiport Wilkinson-like power combiner design methodology is not available for those applications, phase-shifting techniques and symmetric power splitting devices are utilized to achieve a flatter response compared to conventional techniques. Along with the effect of the band-widening technique based on curved geometries, the significant flatness improvements of our newly designed microwave beam-forming network. Before that, some fundamentals about power combining and splitting are also given.