Modelling and Measurements on minimum-width transmission-lines from 10–67GHz in 65nm CMOS

Transmission-line models for high-frequency wideband applications should preferably directly relate to the physical dimensions and effects. Various simulation modes (both linear and non-linear in the frequency- and time-domain) point towards the use of a straightforward model using frequency dependent resistances, inductances, and capacitances. However, not all simulators accept frequency dependent elements. This paper presents the design, characterisation and modelling results of 35, 50 and 70 ohm minimum-width transmission lines and 90 degree corners in the TSMC 65 nm process for high frequency (10-67 GHz) applications using frequency-independent elements.