Inexpensive approach to dielectric measurements

Split post dielectric resonators (SPDR) are commonly used for measurements of complex permittivity and losses measurements of many materials. The permittivity of the sample is calculated basing on the change in a resonance curve of the loaded and unloaded SPDR. The paper presents an inexpensive replacement for Vector Network Analyser normally used to determine the resonator´s Q-factor. The proposed system is recommended for those customers, who don´t need such rich-featured equipment as VNAs.