This paper presents coplanar waveguide structures with low attenuation and slow-wave reduction implemented in standard silicon technologies and suitable for frequencies of up to 40 GHz. Optimization and modelling of slow-wave coplanar waveguides (SW-CPW) is provided here and compared to standard CPW models. An on-chip SW-CPW attenuation of 0.25 dB/mm at 40 GHz is obtained, compared with 2.8 dB/mm for a standard CPW. As an application, a non-linear transmission line (NLTL) was designed using SW-CPW sections. This NLTL can sharpen the pulse rise time by 75%. This work demonstrates the feasibility and advantage of using SW-CPW techniques to build all-silicon pulse-compression NLTLs using commercial silicon foundry processes.

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Keywords CMOS, CPW, NLTL, Non-linear transmission line, Slow-wave CPW
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Conference 37th European Microwave Conference, EUMC
Amaya, R, Li, M. (Ming), Harrison, R.G. (Robert G.), & Garry Tarr, N. (2007). Coplanar waveguides in silicon with low attenuation and slow wave reduction. Presented at the 37th European Microwave Conference, EUMC. doi:10.1109/EUMC.2007.4405239