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NMC–NMIJ bilateral comparison of millimeter-wave attenuation in WR-15 waveguide band at 50 GHz and 54 GHz
Affiliation:1. National Institute of Advanced Industrial Science and Technology, National Metrology Institute of Japan, Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan;2. National Metrology Centre, Agency for Science, Technology and Research, 1 Science Park Drive, Singapore 118221, Singapore;1. Institute of Clinical Physiology, National Council of Research, Pisa, Italy;2. Fondazione G. Monasterio CNR – Regione Toscana, Pisa, Italy;3. Department of Information Engineering, University of Pisa, Pisa, Italy;4. Paramed s.r.l, Genoa, Italy;1. Instituto de Geociencias IGEO (CSIC, UCM), C/José Antonio Nováis 12, 28040 Madrid, Spain;2. CEI – Moncloa, UCM-UPM, CSIC, Madrid, Spain;3. Department of Telematic Engineering and Electronic, School of Telecommunications Engineering, ETSIST, Technical University of Madrid, Spain;1. Department of Physics, Faculty of Science, Malayer University, Malayer, Iran;2. Shahid Tondgooyan Petrochemical Company, Mahshahr, Iran;1. School of Electronics and Information Engineering, Soochow University, Suzhou 215006, China;2. School of Electronics & Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Abstract:This paper reports on a bilateral comparison of millimeter-wave attenuation in WR-15 waveguide band between the National Metrology Institute of Japan (NMIJ) and the National Metrology Centre, A1STAR (NMC). Different types of attenuation measurement systems were independently developed at both laboratories. The systems are based on a stabilized single-channel intermediate frequency (IF) substitution method at NMIJ, and a dual-channel audio frequency substitution method at NMC. A comparison was carried out at 50 GHz and 54 GHz using a programmable step attenuator fitted with precision coaxial to waveguide adaptors as a traveling standard. Good agreement of the measurement results between both laboratories was verified in the attenuation range up to 60 dB.
Keywords:Bilateral comparison  Millimeter-wave attenuation  Attenuation standard  Uncertainty estimation  Degree of equivalence
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