Cu/Co metaconductor based high signal integrity transmission lines for millimeter wave applications

This work reports copper/cobalt (Cu/Co) metaconductor based coplanar waveguide (CPW) transmission lines, featuring excellent signal integrity at K-bands and millimeter wave frequencies such as low conductor loss, reduced signal dispersion, and low noise figure. CPW transmission lines consisting of 10 pairs of Cu/Co thin film metaconductors with each layer thickness of 150 nm/25 nm, respectively, have been designed, fabricated and characterized. Experimental results show an RF resistance reduction of up to 50 % (Max.) in 7 GHz-32 GHz, 25.5 % delay performance improvement, and 30 % thermal noise voltage reduction compared with reference copper based CPWs. Compared with devices from other literatures, the presented device shows the best signal integrity performance in Ku, K, and Ka bands.