Final report on CCEM.RF-K4.CL comparison: RF-voltage measurements up to 1 GHz

Abstract

We report the results of an international comparison of measurements of radio frequency voltage in the frequency range 1 MHz to 1 GHz. This comparison was performed as a Key Comparison under the auspices of the Consultative Committee for Electricity and Magnetism (CCEM) of the International Committee for Weights and Measures (CIPM). Participating laboratories were the designated national metrology institutes (NMIs) for their respective countries.Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).

Evaluation of a Calorimetric Thermal Voltage Converter for RF–DC Difference up to 1 GHz

“…In comparison to the traveling standards in the CCEM.RF-K4.CL key comparison [10], the evaluated results for the NRC CTVC up to 1 GHz look encouraging. However, to be a reliable reference standard for RF-DC difference up to 1 GHz, further investigations for the CTVC are still required.…”

“…Moreover, comparing the results shown in Fig. 5 to the results evaluated by NMC, A*STAR for traveling standards in the key comparison CCEM.RF-K4.CL [10], it is found that the working frequency range of the CTVC designed by NRC could be extended up to 1 GHz. Furthermore, if reversely using (15) and (11), the RF-DC difference δ at the middle of the tee of a CTVC could be transferred to the calibration factor K of a power sensor.…”

“…The CTVC then becomes a good candidate for calibrating RF power sensors in terms of its related AC-DC/RF-DC transfer difference instead of the effective efficiency/calibration factor. Therefore, the National Metrology Centre of the Agency for Science, Technology and Research of Singapore (NMC, A*STAR, [formerly SPRING]), a participant in the CCEM.RF-K4.CL key comparison [10] of RF voltage measurements up to 1 GHz, worked together with the NRC to evaluate the performance of the CTVC up to this frequency. To indicate that in this paper the operating frequency is up to 1 GHz, we use RF-DC acronym rather than AC-DC (<100 MHz normally) in the rest of this paper.…”