DOI: 10.1109/TMTT.2026.3677492   IEEEXplore: https://ieeexplore.ieee.org/document/11482681    

All-solid-state wideband I/Q mixer with low insertion loss (IL) and high image rejection ratio (IRR).

0.215 THz

Targeted phase response optimization achieves a highly balanced broadband hybrid coupler and a low-insertion-loss mixer with high image rejection. A single-conductor spoof surface Plasmon polaritons (SSPPs) transmission line was designed with TEM-matched dispersion, and a sector-shaped probe enabled broadband phase matching. This approach bridges the gap between terahertz solid-state devices and mature TEM technology.

Single carrier wireless data communication systems capable of terabytes/hour channel capacity to support bursty communications typical of uncrewed systems, low-altitude economy, and immersive wearable devices.

15 dB conversion loss / noise figure (CL/NF); > 20 dB image rejection ratio (IRR) across a 64-GHz bandwidth. 300 Gb/s line rate using 64-QAM modulation at 50 Gbaud with 5.68 x 10-3 bit error rate (BER) and 14.48% error vector magnitude (EVM).