Cu/Co metaconductor based coplanar waveguide with sub 0.1 dB/mm insertion loss at 28 GHz

This paper reports a breakthrough result on a Cu/Co metaconductor based coplanar waveguide (CPW) with a substantially low insertion loss of 0.075 dB/mm at 28 GHz for the 5th generation new radio (5G NR) interconnect applications. Based on the scalability study with fabricated 7, 10, and 20 pairs of Cu/Co nanolayered metaconductors on a glass substrate, the 20 paired one shows the lowest insertion loss, whose equivalent series resistance is 54 % lower than that of a solid Cu based counterpart in the frequency band of n257 (26.5-29.5 GHz).