About the Authors
- Shao-Meng Qin
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Affiliation Aalto University, Department of Applied Physics, Espoo, Finland
- Hannu Verkasalo
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Affiliations WR WIRELESS RESEARCH Ltd, Espoo, Finland, Zokem Ltd, Espoo, Finland
- Mikael Mohtaschemi
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Affiliation Aalto University, Department of Applied Physics, Espoo, Finland
- Tuomo Hartonen
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Affiliation Aalto University, Department of Applied Physics, Espoo, Finland
- Mikko Alava
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* E-mail: mikko.alava@aalto.fi
Affiliation Aalto University, Department of Applied Physics, Espoo, Finland
Competing Interests
The authors have the following interests. Author H.Verkasalo was affiliated with WR WIRELESS RESEARCH Ltd, but is now affiliated to Zokem Ltd (since acquired by Arbitron Inc.). There are no patents, products in development or marketed products to declare. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.
Author Contributions
Conceived and designed the experiments: SQ HV MM TH MA. Performed the experiments: SQ HV MM TH MA. Analyzed the data: SQ MM TH MA. Contributed reagents/materials/analysis tools: SQ HV MM TH MA. Wrote the paper: SQ MM TH MA.