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In this paper, microwave imaging as a tool for estimation of soil moisture content is presented. Two experimental setups employing microwave antennas as transmitter and probing sensors are discussed.
The paper presents a compact sensor antenna for soil moisture measurement. With a simple measurement setup, the method is valid for all types of soil. Overall structure of the antenna is 12mm × 12mm × 1.6mm. A 10 arm spiral antenna is embedded onto a 50 Ω Asymmetric Coplanar Strip transmission line. The antenna is fabricated on a substrate with εr =4.4 and loss tangent 0.02....
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