27b5c6f1-4ad3-4ce5-8623-96fca6ec809320250606014530390wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON COMMUNICATIONS2224-28641109-274210.37394/23204http://wseas.org/wseas/cms.action?id=4021318202531820252410.37394/23204.2025.24https://wseas.com/journals/communications/2025.phpBroadband-matching of Coupled Inductive Loops Used for Vehicle CommunicationsKarl HeinzKraftFaculty of Electrical Engineering, Ostfalia University of Applied Sciences, Salzdahlumer Str. 46-48, D-38302 Wolfenbüttel, GERMANYSafe and effective data communications systems are important components for modern traffic management. The transmission of information between vehicles and wayside equipment is required for railway systems, for management of road traffic and for control of transportation within factories. The application of inductive loops is well-known for all the named cases using different dimensions, frequencies and data transmission rates. A general approach seems to be useful in order to develop a design strategy taking into account the magnetic field, the geometric properties, the required transmission rate and therefore the bandwidth and structure of the filters to be used. The developed procedure delivers an optimized filter design based on the frequency-depending power transfer.66202566202511163https://wseas.com/journals/communications/2025/a065104-1122.pdf10.37394/23204.2025.24.3https://wseas.com/journals/communications/2025/a065104-1122.pdfTransport modes. European Comission, [Online]. https://transport.ec.europa.eu/transportmodes_en (Accessed Date: October 11, 2024). Eurobalise. DetailedPedia, [Online]. https://www.detailedpedia.com/wikiEurobalise (Accessed Date: October 11, 2024). M.Vajdik, D. Komosny, I. Herman: Shortrange Data Transmission Using Inductive Method. WSEAS Transactions on Communications, vol. 2 2003, pp. 190-193. R. A. Gheorghiu, I. Badescu, R. S. Timnea: Infrastructure to vehicle communications using inductive loops. WSEAS Transactions on Communications, Vol. 13, 2014. 10.1515/freq.1998.52.11-12.230K. H. Kraft: Breitbandanpassung von Leiterschleifen (Broadband Matching of Inductive Loops). Frequenz 52, 1998, 11/12, pp. 230- 235. 10.5772/intechopen.96345P.Lathiya, J. Wang: Near-Field Communications (NFC) for Wireless Power Transfer (WPT): An Overview. IntechOpen, Open Access Chapter, from Wireless Power Transfer- Recent Development, Applications and New Perspectives, 2021. 10.37394/232020.2022.2.19W. Zhang, W. Niu, W. Gu: Experimental investigation of transfer characteristics of midrange underwater wireless power transfer. PROOF- Int. J. of Appl. Science and Engin., Vol. 2, 2022, doi: 10.37394/232020.2022.2.19. Y. Yamamoto, K. Yamaguchi, T. Hirata, I. Hodoka: Feedback effect for wireless highpower transmission. WSEAS Transactions on Circuits and Systems, Vol.13, 2014. M. Thompson: Inductance Calculation Techniques. Part II. Power Control and Intelligent Motion, December 1999. H. W. Bode: Network Analysis and Feedback Amplifier Design. Van Nostrand, New York 1956. R. Saal, W. Entenmann: Handbook of Filter Design. Hüthig, Heidelberg 1973.