A new standalone microwave instrument for measuring the complex permittivity of materials at microwave frequencies.

This article reports the development of a stand-alone and portable instrument designed to measure the complex permittivity of dielectric materials at microwave frequencies. The equipment consists of an in-house single-port vectorial reflectometer and a resonant coaxial bireentrant microwave cavity where the material under test (MUT) is placed inside a Pyrex vial, making the device appropriate for ...