Wideband Printed Ridge Gap 45° Schiffman phase shifter for millimeter wave systems

The millimeter wave band is a highly potential candidate for wireless and imaging systems. Designing millimeter wave components using new promising technology such as the printed ridge gap waveguide is highly recommended. Phase shifters are essential components in beam forming networks and phased arrays. In this paper, a wideband 45° Schiffman phase shifter is designed in the printed ridge gap waveguide technology at 30 GHz. It has a wide bandwidth from 24.59 to 36.83 GHz (39.8%) with return loss better than 14 dB and output phase difference of 45° ± 3.5°.