High-frequency (HF) and ultra-high-frequency (UHF) power measurements are applied in various industries both in the development and design of radio-electronic equipment and in testing, commissioning, or repair. Since such measurements are one of the basic types of measurement for metrological support in the field of radio engineering and communication, it is necessary to ensure metrological traceability of the calibration of working standards and measuring instruments to standards on fundamental constants in wide frequency and dynamic ranges. The National primary standard of Ukraine for units of power of electromagnetic oscillations in coaxial paths reproduces units of power in the frequency range 0.03 … 18 GHz, and the frequency range of the nomenclature of watt-meters and power converters are much wider – from 9 kHz, and for some types of converters even from direct current. The calibration and measurement capabilities of HF and UHF power measurement of national laboratories of different countries were studied for the possibility of solving the issue of expanding the frequency range of calibration of HF and UHF power meters. The analysis of data on the calibration factor and the efficiency factor in coaxial paths with a resistance of 50 Ohm in the Database of Key Comparisons of the International Bureau of Weights and Measures was carried out. A study of possible solutions was carried out and a scheme was developed to reproduce a unit of power by units of voltage and resistance using a precision voltmeter Boonton 9242 RF for the calibration of measuring transducers Rohde&Schwarz NRP-Z55 and NRP6A in the frequency range from 0.1 … 30 MHz. A reproduction model was created based on the developed scheme, and the contributions of the reproduction model components to the calibration result and the corresponding uncertainties of the model components were estimated. The measurement uncertainty budget was drawn up based on the proposed calibration model of radio signal power measuring transducers.
[1] Velychko O., Gaman V., Kursin S., "Calibration features for power meters of high and microwave frequencies". Ukrainian Metrological Journal, 2022, No. 2, pp. 9-14. DOI: 10.24027/2306-7039.1.2022.263724.
https://doi.org/10.24027/2306-7039.2.2022.263724
[2] Velychko O. N., "Traceability of measurement results at different levels of metrological work". Measurement Techniques, vol. 52, 2009, No. 11, p. 1242-1248. DOI: 10.1007/s11018-010-9428-7.
https://doi.org/10.1007/s11018-010-9428-7
[3] Velychko O., Gordiyenko T., "Metrological Traceability at Different Measurement Levels. Standards". Methods and Solutions of Metrology, Published by IntechOpen, London, United Kingdom, 2019; Chapter 1, pp. 1-21. doi: 10.5772/intechopen.84853.
https://doi.org/10.5772/intechopen.84853
[4] EA-04/02 M, "Evaluation of the Uncertainty of Measurement in Calibration". EA, 2021 [Electronic resource]. - Available at: https://www.accredia.it/en/ documento/ea-4-02-rev-03-evaluation-of-the-uncertaintyof-measurement-in-calibration/.
[5] Zhang Z., Liao X. A Microwave Power Sensor. In: Huang QA. (eds), "Micro Electro Mechanical Systems. Micro/Nano Technologies". Springer, Singapore, 2018. DOI: 10.1007/978-981-10-5945-2_32.
https://doi.org/10.1007/978-981-10-5945-2_32
[6] X. Cui, Y. S. Meng, Y. Shan, and Y. Li., "Microwave Power Measurements: Standards and Transfer Techniques. New Trends and Developments in Metrology", Luigi Cocco (Ed.), IntechOpen, 2016, pp. 3- 20. DOI: 10.5772/60442.
https://doi.org/10.5772/60442
[7] Y. Shan and X. Cui, "RF and Microwave Power Sensor Calibration by Direct Comparison Transfer. Modern Metrology Concerns", Luigi Cocco (Ed.). IntechOpen, 2012, pp. 175-200. DOI: 10.5772/34553.
https://doi.org/10.5772/34553
[8] Y. S. Meng, Y. Shan, "Measurement and Calibration of A High-Sensitivity Microwave Power Sensor with An Attenuator". Radio engineering, vol. 23, no. 4, 2014, pp. 1055-1060 [Electronic resource]. - Available at: https:// www.radioeng.cz/fulltexts/2014/14_04_1055_1060.pdf.
[9] M. Rodriguez, M. Celep, M. Hudlicka, et. al. "Calibration of power sensors for low-power measurement: Best practice guide". EMPIR 15RPT01, RFMicrowave, 2019 [Electronic resource]. - Available at: http://www.rfmw.cmi.cz/documents/deliverables/Calibrati on_power_sensors_low-power_measurement.pdf.
[10] Mescheriak O., Velychko O., "Calibration of analyzers of mobile communication system parameters". Measuring Equipment and Metrology, 2022. Vol. 83(3), pp. 30-34. DOI: 10.23939/istcmtm2022.03.030.
https://doi.org/10.23939/istcmtm2022.03.030
[11] Ginley R., "A Direct Comparison System for Measuring Radio Frequency Power (100 kHz to 18 GHz)". Measure 2006; 1(4) 46-49. DOI: 10.1080/19315775.2006. 11721347.
https://doi.org/10.1080/19315775.2006.11721347
[12] The BIPM key comparison database (KCDB) [Electronic resource]. - Available at: http://kcdb.bipm.org.
[13] Agilent Technologies. Fundamentals of RF and Microwave Measurements (Part 4). An Overview of Agilent Instrumentation for RF/Microwave Power Measurements. [Electronic resource]. - Available at: https://www.ab4oj.com/test/docs/5988-9216EN.pdf.
[14] L. Brunetti, L. Oberto, E. Vremera, "Thermoelectric sensors as microcalorimeter load", IEEE Trans. Instr. Meas., vol. 56, No. 6, pp. 2220-2224, Dec. 2007. DOI: 10.1109/TIM.2007.908135
https://doi.org/10.1109/TIM.2007.908135
[15] Guide DKD-L 02-02 Procedures for a traceable RF voltage measurement, Edition 04/2014, Revision 0, Physikalisch-Technische Bundesanstalt, Braunschweig, and Berlin. DOI: 10.7795/550.20190509.
[16] 9240 Series RF Voltmeter Data Sheet. [Electronic resource]. - Available at: https://boonton.com/Portals/ 0/Datasheets/BTN_9240%20Datasheet_9.22.pdf.
[17] M3003 The Expression of Uncertainty and Confidence in Measurement. Edition 4 October 2019. [Electronic resource]. - Available at: https://www.ukas.com/wpcontent/uploads/schedule_uploads/759162/M3003-The....
[13] Agilent Technologies. Fundamentals of RF and Microwave Measurements (Part 4). An Overview of Agilent Instrumentation for RF/Microwave Power Measurements. [Electronic resource]. – Available at: https://www.ab4oj.com/test/docs/5988-9216EN.pdf.
[14] L. Brunetti, L. Oberto, E. Vremera, “Thermoelectric sensors as microcalorimeter load”, IEEE Trans. Instr. Meas., vol. 56, No. 6, pp. 2220–2224, Dec. 2007. DOI: 10.1109/TIM.2007.908135
[15] Guide DKD-L 02-02 Procedures for a traceable RF voltage measurement, Edition 04/2014, Revision 0, Physikalisch-Technische Bundesanstalt, Braunschweig, and Berlin. DOI: 10.7795/550.20190509.
[16] 9240 Series RF Voltmeter Data Sheet. [Electronic resource]. – Available at: https://boonton.com/Portals/ 0/Datasheets/BTN_9240%20Datasheet_9.22.pdf.
[17] M3003 The Expression of Uncertainty and Confidence in Measurement. Edition 4 October 2019. [Electronic resource]. – Available at: https://www.ukas.com/wpcontent/uploads/schedule_uploads/759162/M3003-The....