Sensors 2011, 11(9), 8295-8308; doi:10.3390/s110908295
Article

The Effect on Wireless Sensor Communication When Deployed in Biomass

1,* email, 1email, 2email and 3email
Received: 1 August 2011; in revised form: 22 August 2011 / Accepted: 23 August 2011 / Published: 25 August 2011
(This article belongs to the Special Issue Sensors in Agriculture and Forestry)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Wireless sensor networks (WSN) have been studied in a variety of scenarios over recent years, but work has almost exclusively been done using air as the transmission media. In this article some of the challenges of deploying a WSN in a heterogeneous biomass, in this case silage, is handled. The dielectric constant of silage is measured using an open-ended coaxial probe. Results were successfully obtained in the frequency range from 400 MHz to 4 GHz, but large variations suggested that a larger probe should be used for more stable results. Furthermore, the detuning of helix and loop antennas and the transmission loss of the two types of antennas embedded in silage was measured. It was found that the loop antenna suffered less from detuning but was worse when transmitting. Lastly, it is suggested that taking the dielectric properties of silage into account during hardware development could result in much better achievable communication range.
Keywords: WSN; permittivity; transmission loss; detuning; biomass storage
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MDPI and ACS Style

Larsen, J.J.; Green, O.; Nadimi, E.S.; Toftegaard, T.S. The Effect on Wireless Sensor Communication When Deployed in Biomass. Sensors 2011, 11, 8295-8308.

AMA Style

Larsen JJ, Green O, Nadimi ES, Toftegaard TS. The Effect on Wireless Sensor Communication When Deployed in Biomass. Sensors. 2011; 11(9):8295-8308.

Chicago/Turabian Style

Larsen, Jakob Juul; Green, Ole; Nadimi, Esmaeil S.; Toftegaard, Thomas Skjodeberg. 2011. "The Effect on Wireless Sensor Communication When Deployed in Biomass." Sensors 11, no. 9: 8295-8308.

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