Sokoll, ThorstenThorstenSokollJacob, Arne F.Arne F.Jacob2021-11-022021-11-022008-02-01Microwave and Optical Technology Letters 50 (2): 287-293 (2008-02-01)http://hdl.handle.net/11420/10747A Low-cost measurement system suited for in situ moisture monitoring of buildings is presented. The system consists of a robust and compact resonant microwave sensor linked to a miniaturized, low-cost vector network analyzer. Several such systems can be controlled by a central monitoring station. The measurement accuracy is enhanced significantly by vectorial self-calibration. To determine the magnitude and the required 360°-phase information, an inexpensive combined gain and 180°-phase detector is used, where the full phase information is obtained by adequately modeling the sensor's and the calibration standards ' phase response. Different self-calibration circuits are examined and their suitability is proved by comparative measurements. Finally, the system's performance is tested in a high humidity environment.en0895-247720082287293Microwave aquametryNetwork analyzerPhase modelingSelf-calibration circuitsSensor systemAllgemeines, WissenschaftJournal Article10.1002/mop.23083Other