IEEE Transactions on Instrumentation and Measurement · 2012 · 19 citations · 5 references
EngineeringElectrical EngineeringHeat TransferMicrowave EngineeringThermal AnalysisCalibrationCalorimetryEquipment CalibrationMicrowave MeasurementsSensor CalibrationTemperature MeasurementCalorimetric DetectorsControl FeedbackEnergy CalibrationInstrument Calibration In CalorimetryRadiometer CalibrationRadiometer DesignRectangular WaveguidesThermal Feedback
A new broadband rectangular waveguide calorimeter for radio-frequency (RF) power meter calibration in the millimeter-wave region is reported. The calorimeter has a quasi-twin structure exploiting the WR-10 and WR-15 rectangular waveguides, and its operational frequency ranges from 50 to 110 GHz. This calorimeter is characterized by its high measuring speed and sensitivity. A thermal feedback control system reduces the typical reading time per frequency to less than 10 min, and the minimum measurable incident RF power is 0.2 mW. A new technique for reducing the equivalence error by utilizing a flat millimeter-wave absorber is also discussed.
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