This letter presents a wideband substrate-integrated waveguide (SIW) crossover employing back-to-back SIW-to-grounded coplanar waveguide (GCPW) transitions. The design is based on a spatially confined CPW-like mode at the intersection of orthogonal paths to minimize cross-coupling. A scalable topology is demonstrated, allowing architecture to support multiple crossing paths (e.g., 1×1, 1×3, 2×2) without degrading bandwidth. Experimental results for a 1 \times 1 prototype demonstrate an 83% fractional bandwidth (6.7–16.9GHz) with isolation>25dB and return loss >12dB. A comparative analysis confirms the design achieves a superior figure of merit (FoM) in terms of bandwidth, isolation, and loss relative to the state of the art.
Extendable Wideband SIW Crossover Using Back-to-Back SIW-to-GCPW Transitions
Bordbar A.;De Marco R.;Arnieri E.;Amendola G.;Boccia L.
2026-01-01
Abstract
This letter presents a wideband substrate-integrated waveguide (SIW) crossover employing back-to-back SIW-to-grounded coplanar waveguide (GCPW) transitions. The design is based on a spatially confined CPW-like mode at the intersection of orthogonal paths to minimize cross-coupling. A scalable topology is demonstrated, allowing architecture to support multiple crossing paths (e.g., 1×1, 1×3, 2×2) without degrading bandwidth. Experimental results for a 1 \times 1 prototype demonstrate an 83% fractional bandwidth (6.7–16.9GHz) with isolation>25dB and return loss >12dB. A comparative analysis confirms the design achieves a superior figure of merit (FoM) in terms of bandwidth, isolation, and loss relative to the state of the art.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
