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Subsurface radio

  • US 10,284,353 B2
  • Filed: 10/28/2016
  • Issued: 05/07/2019
  • Est. Priority Date: 10/28/2016
  • Status: Active Grant
First Claim
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1. A subsurface radio comprising:

  • a radio transceiver including a transmitter configured to transmit a voice data through a subsurface environment, and a receiver configured to receive the voice data through the subsurface environment;

    a subwavelength antenna coupled to the radio transceiver and configured to radiate an electromagnetic (EM) wave modulating the voice data, the subwavelength antenna having a radiating length less than a transceiver wavelength of the radio transceiver operating in free-space at a maximum of a transceiver frequency, wherein the transceiver frequency is one of a transmit frequency of the transmitter and a receive frequency of the receiver;

    a slave radio transceiver configured to transmit and the radio transceiver configured to receive, for each of a plurality of transceiver frequencies, a respective SNR and a respective signal strength;

    a control unit configured to change the transceiver frequency to an optimal transceiver frequency in response to a change to the subsurface environment; and

    an impedance matching circuit configured to match a first impedance of the subwavelength antenna to a second impedance of the transceiver in response to a difference between the first impedance and the second impedance exceeding an impedance mismatch value.

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