(Micro)waves of the Caribbean

In January 2025, Radio & Wireless Week 2025 took place in sunny Puerto Rico. We traveled there with a fairly large group from Ruhr University Bochum, consisting of:
Tobias T. Braun, Melika Dedovic, Marc Hamme, Hakan Papurcu, Nils Pohl, Justin Romstadt, Francesca Schenkel (HFS), Pascal Stadler, and Muhammed Ali Yildirim.

There, we presented our latest research findings and contributed the following papers to the conference:

• A 268 GHz LNA for sub-THz Applications in a 90 nm SiGe:C Technology
• A 0.37 THz Subharmonic Downconverting IQ Mixer in a 90 nm SiGe:C BiCMOS Technology with High Image Rejection Ratio
• A 40-58 GHz Differential Three-Push Frequency Tripler in a 90-nm SiGe BiCMOS Technology
• Proving the Feasibility of D-Band Single SiGe MMIC Vector Network Analyzer Extension Modules with Large System Dynamic Range
• An E-Band Quadrupler Utilizing a 45° Polyphase Filter for Improved Harmonic Rejection
• Mirror-based FMCW Radar System for 3-D Environmental Imaging
• Introducing Inharmonic Radar: Tag Detection in the Automotive Bands of Present and Future at 76–81/134–141 GHz via Fractional Multiplication
• Two Differential Wideband SIW-to-RWG Transitions for Thin Single Layer Substrates With Additional Tapering for D-Band Applications

A particular highlight was that Tobias T. Braun won second place in the Student Design Competition. He presented the paper, titled “Two Differential Wideband SIW-to-RWG Transitions for Thin Single Layer Substrates With Additional Tapering for D-Band Applications”—co-authored by Justin Romstadt, Steffen Hansen, Christian Schweer, and Nils Pohl—in both a pitch and a poster presentation, successfully convincing the jury.