High Temperature Permittivity measurement in microwave domain

This paper presents a method for measuring the electromagnetic parameters of solid materials over a large frequency band (0.1 to 18 GHz) and at very high temperatures (up to 400°C).The particularity of the prototype is a system of connection and disconnection between the temperature controlling structure and the radiofrequency measurement system, to overcome the constraints of standard connectors, only allowing measurements from ambient temperature to 85°C.