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The effect on wireless sensor communication when deployed in biomass.
Jakob Juul Larsen1, Ole Green, Esmaeil S Nadimi
1Department of Biosystems Engineering, Faculty of Agricultural Sciences, Aarhus University, Blichers Alle 20, P.O. Box 50, Tjele DK-8830, Denmark. JakobJuul.Larsen@agrsci.dk
Sensors (Basel, Switzerland)
|December 14, 2011
Summary
Deploying wireless sensor networks (WSN) in silage presents unique challenges. Understanding silage
Area of Science:
- Agricultural Engineering
- Wireless Communication
- Biomass Sensing
Background:
- Wireless sensor networks (WSN) typically utilize air as the transmission medium.
- Deploying WSN in heterogeneous biomass, such as silage, introduces unique challenges.
Purpose of the Study:
- To investigate the feasibility and challenges of using WSN in silage.
- To characterize the dielectric properties of silage and their impact on antenna performance.
Main Methods:
- Measured the dielectric constant of silage using an open-ended coaxial probe (400 MHz - 4 GHz).
- Assessed antenna detuning and transmission loss for helix and loop antennas embedded in silage.
Main Results:
- Dielectric constant measurements showed significant variations, suggesting the need for larger probes.
- Loop antennas experienced less detuning but higher transmission loss compared to helix antennas in silage.
Conclusions:
- Silage's dielectric properties significantly affect WSN performance.
- Incorporating silage's dielectric properties into hardware design can enhance communication range.
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