Skip to main content
SpringerLink
Log in

Demodulation of 13.56 MHz load-modulated signals

Demodulation von 13,56-MHz-lastmodulierten Signalen

  • Originalarbeit
  • Published:
e & i Elektrotechnik und Informationstechnik Aims and scope Submit manuscript

Summary

The paper addresses the demodulation of load modulated signals. Such signals are typically generated by transponders in the reactive near field of High Frequency Radio Frequency Identification (HF-RFID) systems in the 13.56 MHz range. Besides a brief analysis of limitations of such systems we present a simple yet robust demodulation method which can be used with detuned antennas and non-binary modulation methods.

Zusammenfassung

Dieser Artikel behandelt die Demodulation von lastmodulierten Signalen. Solche Signale werden typischerweise von Transpondern erzeugt, die sich im reaktanten Nahfeld eines 13,56 MHz Radio Frequency Identification (HF-RFID)-Lesegeräts befinden. Neben einer Beschreibung der Systeme und Diskussion der Grenzen solcher Systeme wird eine einfache und dennoch robuste Methode zur Demodulation vorgestellt, die sowohl für verstimmte Antennen sowie bei nicht-binären Modulationsarten eingesetzt werden kann.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • ERC (1999): Propagation model and interference range calculation for inductive systems 10 kHz–30 MHz. Technical Report 69, European Radiocommunications Committee (ERC) within the European Conference of Postal and Telecommunications Administrations (CEPT), Marabella.

  • ERC (2007): Relating to the use of shorth range devices (SRD). ERC Recommendation 70–03.

  • Finkenzeller, K. (2003): RFID handbook: radio frequency identification fundamentals and applications, 2nd ed. New York: John Wiley & Sons.

    Google Scholar 

  • Haderer, A. (2005): Signalverarbeitung für ein Lesegerät für kontaktlose Identifikationskarten. Master's Thesis, TU Graz.

  • ISO (2000): International Standard ISO/IEC15693 Part 2: Air interface and initialization, May 2000.

  • Lehner, G. (1990): Elektromagnetische Feldtheorie für Ingenieure und Physiker. Berlin: Springer.

    Google Scholar 

  • Sklar, B. (2001): Digital communications. New Jersey: Prentice Hall PTR.

    Google Scholar 

  • Steiner, G., Zangl, H., Fulmek, P., Brasseur, G. (2004): A tuning transformer for the automatic adjustment of resonant loop antennas in RFID systems. In: IEEE Int. Conf. on Industrial Technology, Hammamet, Tunisia, December 8–10, 2004.

  • Zangl, H., Bretterklieber, T., Haderer, A., Brasseur, G. (2006): Method for Demodulating and Reading Device for Evaluating Load-Modulated Signals, Austrian Patent AT 501055.

Download references

Author information

Authors and Affiliations

  1. Institute of Electrical Measurement and Measurement Signal Processing, Graz University of Technology, Graz, Austria

    H. Zangl & Th. Bretterklieber

Authors
  1. H. Zangl
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Th. Bretterklieber
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Zangl, H., Bretterklieber, T. Demodulation of 13.56 MHz load-modulated signals. Elektrotech. Inftech. 124, 364–368 (2007). https://doi.org/10.1007/s00502-007-0481-0

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00502-007-0481-0

Keywords

Schlüsselwörter

Search

Navigation