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Antenna circuit matching the soil conditions

  • US 8,368,529 B1
  • Filed: 01/31/2010
  • Issued: 02/05/2013
  • Est. Priority Date: 02/03/2009
  • Status: Active Grant
First Claim
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1. A wireless sub-surface soil sensor comprising:

  • a microcontroller configured to measure analog voltages and perform calculations to determine the real-time soil conductivity value and the real-time soil dielectric constant value;

    an antenna; and

    an antenna circuit in communication with the microcontroller and the antenna, the antenna circuit comprising a plurality of resistors and inductors for tuning the antenna, the antenna circuit configured to utilize a real-time soil conductivity value of a soil area and a real-time soil dielectric constant value of a soil area to vary the properties of the antenna to closely match the soil conditions and improve a communication range and communication reliability of the antenna to wirelessly transmit a plurality of soil data through the soil to the surface.

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