AUTOMATED MEASUREMENT OF COMPLEX PERMEABILITY AND PERMITTIVITY AT HIGH FREQUENCIES
Rastislav Dosoudil – Elemír Ušák – Vladimír Olah
The paper reports here on the reflection frequency-domain measurements to determine the selected electromagnetic properties of materials using an Agilent 8714ET Network analyzer. The measurement process as well as results evaluation are performed by means of computer control. For this purpose, a VEE program (Agilent technology) has been developed. The discussion concerning the optimisation of measurement process and the reduction of unwanted effects is covered in detail. Some ferrite and ferrite-based polymer composite materials were used in experiments and obtained frequency dependences of electromagnetic parameters are analyzed.
Keywords: measurement, permeability, permittivity, network analyzer, ferrite, composite material