Device and method for controlling measurements of complex electrical permittivity spectra in a coaxial cell

Abstract

The subject of the application is a device and method for monitoring the measurement of complex permittivity spectra of a material, comprising a coaxial measuring cell, one end of which is connected via a first connector to a first single-port vector circuit analyzer (VNA) with a first current source. The device is characterized in that it includes a second single-port vector circuit analyzer (VNA) (U2), which is connected to a second connector (Z2) at the other end of the measuring cell (WCP). Furthermore, it includes first and second ADCs (U6, U7) for voltage recording, and first and second shorting relays (K1, K2) for unilaterally shorting the measuring cell (WCP) and switching on the appropriate current source (PS1, PS2). The VNAs (U1, U2) have a DC component filter. The device enables the formation of a DC resistive loop.