Dielectric characterization of biological liquids and tissues up to 110 GHz using an LTCC CPW sensor

In this paper we describe the dielectric characterization up to 110 GHz of various liquids and biological tissues using an on-wafer technique. The materials are placed in a PDMS container and placed on top of a CPW line fabricated on LTCC. The method uses a multi-step method to extract the propagation constant of the CPW line covered by material under test (MUT), which is then used to extract the dielectric constant of the MUT. In this paper, results are presented for ethanol, methanol, distilled water, porcine blood and veal liver. They agree well with the fitted Debye models available in literature.