{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,15]],"date-time":"2025-12-15T14:17:46Z","timestamp":1765808266634,"version":"build-2065373602"},"reference-count":24,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,18]],"date-time":"2024-01-18T00:00:00Z","timestamp":1705536000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"T\u00dcB\u0130TAK UME"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Most calibration laboratories prefer the Direct Comparison Transfer Method (DCTM) for a reliable and accurate calibration of power sensors in the radio frequency (RF) scope. Most studies suggest using this calibration method, with its automatic power level control (APLC) of RF signal generators. The APLC is preferred to keep the output power level of the signal generator the same, while the power sensor is calibrated and the reference power sensor is connected to the measurement system. The known APLC mechanisms are also explained for the DCTM, and a comparison of the calibration factor values carried out with and without the automatic power level control process in the DCTM is also given in this study. RF power sensor calibrations with coaxial and waveguide connector types are examined with DCTM in this study as well. This study shows that the DCTM, unless with APLC, should be applied for the waveguide power sensor\u2019s calibration at millimeter wave frequencies.<\/jats:p>","DOI":"10.3390\/s24020609","type":"journal-article","created":{"date-parts":[[2024,1,18]],"date-time":"2024-01-18T05:52:03Z","timestamp":1705557123000},"page":"609","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Analyzing the Automatic Power Level Control Effect of a Signal Generator in RF Power Sensor Calibration by a Direct Comparison Transfer Method and a Millimeter Wave Application"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6358-8807","authenticated-orcid":false,"given":"Erkan","family":"Danaci","sequence":"first","affiliation":[{"name":"TUBITAK National Metrology Institute (UME), P.O. Box 54, Kocaeli 41470, T\u00fcrkiye"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,18]]},"reference":[{"key":"ref_1","unstructured":"Bailey, A.E. (1989). Microwave Measurements, Peter Peregrinus Ltd."},{"key":"ref_2","unstructured":"Keysigth Application Note 1 (2017). Fundamentals of RF and Microwave Power Measurements (Part 1), Keysight Technology. Application Note 5988-9213."},{"key":"ref_3","unstructured":"Clague, F.R., and Voris, P.G. (1993). Coaxial Reference Standard for Microwave Power, NIST Technical Note 1357."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1109\/19.293461","article-title":"A method to determine the calorimetric equivalence correction for a coaxial microwave microcalorimeter","volume":"43","author":"Clague","year":"1994","journal-title":"IEEE Trans. Instrum. Meas."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Teppati, V., Ferrero, A., and Sayed, M. (2013). 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