학술논문
Microwave Characterization of Liquid Mixtures with a Miniaturized Interdigital Sensor
Document Type
Conference
Source
2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019 IEEE MTT-S International Microwave Workshop Series on. :157-159 Jul, 2019
Subject
Language
Abstract
A miniaturized microstrip interdigital capacitor based sensor is proposed herein to characterize liquid mixtures. For low RF/microwave measurements, the sensing area is modeled as a capacitance in parallel with a conductance. According to the conformal mapping technique, a linear relationship between the capacitance and the permittivity of the liquid under test is obtained, which is further validated through a three-dimensional finite element simulation method. The sensor is then successfully used to characterize deionized water, pure isopropanol, and water-isopropanol mixtures.