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Step Frequency Ground Penetrating Radar Characterization and Federal Evaluation Tests

Analysis

The analysis procedure for the SF GPR emissions characterization data followed equations defined in NTIA Annex K.⁽³⁾ The analysis steps are as follows:

1. Determine the orientation of maximum emissions for each measurement and use this measurement data for subsequent analysis.

2. Calculate EIRP values at each frequency using the following equations. Equation 1 defines field strength as a function of field strength plus adjustments. Equation 2 further refines the definition of field strength as a function of field strength adjusted by the antenna factor and cable loss in terms of a unit length. Equation 3 converts from units in terms of unit length back to units in terms of decibels relative to 1 mW.

   Field Strength (dBµV) = Field Strength (dBm) + 107 (1)

   Field Strength (dBµV/m) = Field Strength (dBµV) + Antenna Factor + Cable Loss (2)

   EIRP in dBm = Field Strength (dBµV/m) – 95.2 (3)

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