Enhanced Robustness in Wideband Rectangular Waveguide-to-Substrate-Integrated-Waveguide Transition Using Dielectric Superstrate
Year: 2025
Type: conference-paper
Abstract: A superstrate-based air-filled rectangular waveguide (RWG) to substrate-integrated waveguide (SIW) transition covering the entire D-band$(110 \text{GHz}-170 \text{GHz})$is presented, with a specific focus on the robustness of the topology against fabrication tolerances. The transition topology relies on a resonant slot and an aperture-coupled resonant patch, co-optimized with a dielectric-loading superstrate to ensure full D-band operation. Particularly, the effectiveness and robustness of this superstrate-based approach is analyzed and compared to alternative strategies. Additionally, the resilience of the proposed component against the strict design tolerances originating from its implementation in a standard Any-Layer High Density Interconnect Printed Circuit Board manufacturing process is analyzed. Measurements of multiple RWG-to-SIW transition prototypes demonstrate a fractional bandwidth of 46 %, effectively covering the entire D-band, while ensuring a low insertion loss of$0.95 \pm 0.15 ~\text{dB}$, proving the proposed transition a reliable component for D-band RWG-to-PCB interfacing.
Institutions: Ghent University, IMEC
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4416367331