CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
Reduced dimension degrees of equivalence represented by Di and their respective 95 % confidence indicators, both dimensionless.
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
Reduced dimension degrees of equivalence represented by Di and their respective 95 % confidence indicators, both dimensionless.
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
Reduced dimension degrees of equivalence represented by Di and their respective 95 % confidence indicators, both dimensionless.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
dimensionless |
dimensionless |
dimensionless |
||
| METAS | 0.0025 | 0.0033 | ||
| NMC, A*STAR | 0.002 | 0.016 | ||
| UME | 0.006 | 0.012 | ||
| NRC | 0.002 | 0.056 | ||
| NMIJ | 0.0050 | 0.0069 | ||
| SNIIM | 0.004 | 0.014 | ||
| NPL | 0.0016 | 0.0036 |
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
Reduced dimension degrees of equivalence represented by Di and their respective 95 % confidence indicators, both dimensionless.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
dimensionless |
dimensionless |
dimensionless |
||
| METAS | 0.0017 | 0.0036 | ||
| CMI | 0.0013 | 0.0067 | ||
| GUM | 0.0035 | 0.0071 | ||
| INRIM | 0.004 | 0.012 | ||
| PTB | 0.0045 | 0.0057 | ||
| RISE | 0.006 | 0.025 | ||
| NMIJ | 0.0022 | 0.0070 | ||
| VSL | 0.0030 | 0.0049 | ||
| LNE | 0.031 | 0.011 | ||
| NPL | 0.0018 | 0.0040 |
| Metrology area, Sub-field | Electricity and Magnetism, Radio frequencies |
| Description | Reflection coefficient / S parameters in PC-3.5 |
| Time of measurements | 2012 - 2015 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Reflection coefficient / S parameters |
| Parameters | Frequency: 50 MHz to 33 GHz |
| Transfer device | Coaxial lines, PC-3.5 connectors |
| Comparison type | Key Comparison |
| Consultative Committee | CCEM (Consultative Committee for Electricity and Magnetism) |
| Conducted by | CCEM (Consultative Committee for Electricity and Magnetism) |
| Comments | Results published 29 January 2026 |
| Pilot institute |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | Ryoko Kishikawa |
| Additional |
| Pilot laboratory | |
|---|---|
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMC, A*STAR |
National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| NRC |
National Research Council, Canada, SIM |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| RISE |
Research Institutes of Sweden AB, Sweden, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VSL |
VSL, Netherlands, EURAMET |
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CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
The key comparison reference value is determined from the weighted mean of the reported results. It is a complex quantity (xR + j yR) where u(xR) and u(yR) are the combined standard uncertainties of xR and yR, respectively.
xR = 0.0086 u(x)R = 0.0011
yR = -0.0245 u(y)R = 0.0011
The reduced dimension degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both dimensionless:
Di , together with its 95 % confidence indicator Ui are calculated as described in Section A1.2 of the CCEM.RF-K5.c.CL Final report.
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
The key comparison reference value is determined from the weighted mean of the reported results. It is a complex quantity (xR + j yR) where u(xR) and u(yR) are the combined standard uncertainties of xR and yR, respectively. The results of of CMI, GUM and LNE were excluded from the calculation of the KCRV as explained in Section A1.1 of the CCEM.RF-K5.c.CL Final report.
xR = 0.00154 u(x)R = 0.00094
yR = 0.00049 u(y)R = 0.00094
The reduced dimension degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both dimensionless:
Di , together with its 95 % confidence indicator Ui are calculated as described in Section A1.2 of the CCEM.RF-K5.c.CL Final report.
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
xi real part of measurement value submitted by institute i, Labi
yi imaginary part of measurement value submitted by institute i, Labi
u(xi) combined standard uncertainty of xi
u(yi) combined standard uncertainty of yi
| Labi | xi | u(xi) | yi | u(yi) | |
| METAS | 0.0061 | 0.0017 | -0.0246 | 0.0017 | |
| NMC, A*STAR | 0.0103 | 0.0066 | -0.0249 | 0.0066 | |
| UME | 0.0039 | 0.0049 | -0.0273 | 0.0049 | |
| NRC | 0.007 | 0.023 | -0.023 | 0.023 | |
| NMIJ | 0.0136 | 0.0030 | -0.0249 | 0.0030 | |
| SNIIM | 0.0064 | 0.0056 | -0.0217 | 0.0056 | |
| NPL | 0.0101 | 0.0019 | -0.0238 | 0.0019 |
CCEM.RF-K5.c.CL
MEASURAND Complex-valued reflection coefficient S11
FREQUENCY 33 GHz
xi real part of measurement value submitted by institute i, Labi
yi imaginary part of measurement value submitted by institute i, Labi
u(xi) combined standard uncertainty of xi
u(yi) combined standard uncertainty of yi
| Labi | xi | u(xi) | yi | u(yi) | |
| METAS | -0.0001 | 0.0017 | 0.0000 | 0.0017 | |
| CMI | 0.0004 | 0.0026 | 0.0000 | 0.0027 | |
| GUM | 0.0008 | 0.0027 | 0.0039 | 0.0027 | |
| INRIM | -0.0026 | 0.0050 | -0.0005 | 0.0050 | |
| PTB | 0.0057 | 0.0025 | 0.0023 | 0.0025 | |
| RISE | 0.007 | 0.010 | 0.004 | 0.010 | |
| NMIJ | 0.0024 | 0.0030 | 0.0024 | 0.0030 | |
| VSL | -0.0011 | 0.0022 | -0.0010 | 0.0022 | |
| LNE | 0.0267 | 0.0043 | -0.0174 | 0.0043 | |
| NPL | 0.0033 | 0.0019 | 0.0005 | 0.0019 |
