Abstract
AbstractThis paper presents a novel transition junction between a grounded coplanar waveguide (GCPW) and a multilayer substrate integrated waveguide (SIW) that is intended as a feed for an SIW antipodal Vivaldi antenna. Compared to other similar transitions, this transition has better matching and lower insertion loss. More specifically, the junction between GCPW and multilayer SIW is designed to improve matching between the two‐layer feed line and the multilayer SIW, thereby reducing unwanted radiation from the transition and improving the radiation pattern of the SIW antipodal Vivaldi antenna. These improvements are illustrated through simulation and measurement of a 34.5–37.5 GHz antipodal Vivaldi antenna that is fed by a SIW feed connected to a GCPW via the improved junction.
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