A coaxial sensor with 3D printing detect the dielectric spectrum of biological liquid up to 130GHz

Abstract

This paper introduces a coaxial sensor with 3D printing technology to detect the dielectric spectrum of biological liquid samples from DC to 130 GHz. The biological liquids are filled in the space between the coaxial inner conductor and the outer conductor. Microfluidic channel is designed for the input and output of the liquid in the coaxial sensor. A special Short-Open-Load-Thru (SOLT) calibration kits are designed to facilitate the extraction of the dielectric spectrum. A simple de-embedding method based on ABCD matrices is adopted, by a multi-step method to extract the dielectric constant within the frequency.