Skip to main content

Optimization of Handset Antennas to Reduce Interaction with the User

  • Chapter
Electricity and Magnetism in Biology and Medicine

Abstract

When using a handset close to the human body a considerable mutual interaction between the antenna and the biological tissue occurs. When investigating this interaction, the main emphasis can be put to either dosimetry or engineering aspects such as the optimization of the antenna. In either case a theoretical and experimental evaluation of the electromagnetic fields is necessary to determine the relevant parameters. These are the specific absorption rate (SAR) in the case of dosimetry and input impedance, radiation patterns, power budget and efficiency when considering the antenna performance. In our work we have developed methods for numerical calculations and measurement techniques in order to design an antenna concept that reduces interaction with the user.

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

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 259.00
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 379.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 329.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

References

  1. V. Hombach, et al.: The Dependence of EM Energy Absorption upon Human Head Modeling at 900 MHz. IEEE Transactions on Microwave Theory and Techniques, vol. 44, no. 10, pp. 1865–1873 (1996).

    Article  Google Scholar 

  2. H.-O. Ruoss, U. Jakobus, and F.M. Landstorfer: Efficient EM-analysis of hand-held mobile telephones close to the human head using a modified method of moments. Electronics Letters, vol. 31, no. 12, pp. 947–948 (1995).

    Article  Google Scholar 

  3. H.-O. Ruoss, and F.M. Landstorfer: Electromagnetic dyadic Green’s function for a layered homogeneous lossy dielectric sphere as head model for numerical EMC investigation. Electronics Letters, vol. 32, no. 21, pp. 1935–1937 (1996).

    Article  Google Scholar 

  4. J. Christ: Korrektur prinzipbedingter und durch die Meßumgebung verursachter Fehler bei der Nahfeld-Fernfeld-Transformation. Dissertation, University of Stuttgart (Germany), (1995)

    Google Scholar 

  5. H.-O. Ruoss, J. Christ, and F.M. Landstorfer: EMC-investigation of hand-held mobile telephones using a doublecone nearfield to farfield transformation. EuMC ‘86, 26 th European Microwave Conference, Prague (Czech Rep.), pp. 795–798 (1996)

    Google Scholar 

  6. H.-O. Ruoss, J. Christ, and F.M. Landstorfer: Multiple probe nearfield scanning for EMC-investigations. EuMC ‘87, 27 th European Microwave Conference, Jerusalem (Israel), pp. 556–560 (1997).

    Google Scholar 

  7. M.A. Jensen and Y. Rahmat-Samii: EM interaction of handset antennas and a human in personal communication. Proceedings of the IEEE, vol.83, no.1, pp. 7–17 (1995).

    Article  Google Scholar 

  8. J. Fuhl, P. Nowak and E. Bonek: Improved internal antenna for hand-held terminals. Electronics Letters, vol. 30, no.22, pp. 1816–1818 (1994).

    Article  Google Scholar 

  9. H.-O. Ruoss, N. Berger and F.M. Landstorfer: Optimized slot antennas for hand held mobile telephones. ICAP ‘87, 10 th International Conference on Antennas and Propagation, Edinburgh (U.K.), pp. 1.381–1.384 (1997).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 1999 Springer Science+Business Media New York

About this chapter

Cite this chapter

Ruoss, HO., Landstorfer, F.M. (1999). Optimization of Handset Antennas to Reduce Interaction with the User. In: Bersani, F. (eds) Electricity and Magnetism in Biology and Medicine. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4867-6_172

Download citation

  • DOI: https://doi.org/10.1007/978-1-4615-4867-6_172

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-7208-0

  • Online ISBN: 978-1-4615-4867-6

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics