Complex dielectric constant measurement techniques for high-speed signaling

A new TR method being implemented on CPW lines is described. To validate the method, a known material, alumina (99.6%), was tested over a wide frequency range (45 MHz to 10 GHz). The results show significant improvement on the characterization of loss tangent. More importantly, the method does not introduce any divergent solutions; therefore there is no need of extra numerical treatments in finding stable solutions.