Answers are grounded in this paper and cite their sources.
Coplanar transmission lines (CPW) are realized on polydimethylsiloxane (PDMS) substrate in order to characterize its complex permittivity, from 1 to 220 GHz. By varying the complex permittivity, the propagation constant of the PDMS-CPW calculated with full wave software is matched to those extracted by de-embedding techniques using S-parameters measurements. The real permittivity evolves from 2.9 to 2.55 while the loss tangent increases slowly to reach 0.048 at 210 GHz.
No takes yet. Share an insight, caveat, or question.
Cresson et al. (2014) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: