Fabry-Perot Open Resonator (FPOR)
QWED offers a novel type of a Fabry-Perot open resonator (FPOR) with Gaussian mirrors for automated broadband and precise resonant measurements of electromagnetic properties of low-loss dielectric sheets in the 20-110 GHz frequency range.
The FPOR system is equipped with a specialized software controlling the measurement process and extracting complex permittivity of the material under test from the measured frequency and quality factor.
The whole measurement setup consists of a computer, where the aforementioned control software is installed, connected to the FPOR and to measurement equipment (either VNA or scalar Q-Meter). The FPOR operates at consecutive TEM0,0,q Gaussian odd modes spaced every 1.5 GHz.
Due to a sophisticated adaptive algorithm implemented in the control software dedicated to precise and robust tracking of the modes during the measurement, total measurement time for 21 frequency points (e.g. in the 20 – 50 GHz frequency range) usually does not exceed 10 minutes.
Table1: Parameters of a Fabry-Perot Open Resonator (FPOR)
Dielectric measurements with a Fabry-Perot open resonator (up to 130 GHz):