S-Parameter Characterization Based on Dielectric Waveguides in D-Band

This paper presents a material characterization S-parameter measurement setup for transmission and reflection measurements in terms of magnitude and phase. Flexible D-band dielectric waveguides enable the direct transmission measurement of the material under test. Furthermore, fundamentals of dielectric waveguides are explained, which form the basis of the measurement system. An FMCW radar calibration concept is presented that can perform complex S-parameter measurements. A dielectric waveguide system including material fixtures was designed and realized by means of a 3D printer within the scope of this work. Finally, measurements were performed and compared with a traditional vector network analyzer measurement setup to demonstrate the functionality of the measurement setup and the potential of the approach.