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Electromagnetic field detection systems and methods

  • US 8,860,402 B2
  • Filed: 10/18/2010
  • Issued: 10/14/2014
  • Est. Priority Date: 10/16/2009
  • Status: Active Grant
First Claim
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1. An electromagnetic pulse (EMP) and intentional electromagnetic interference (IEMI) event detection system comprising:

  • an electromagnetically shielded enclosure; and

    a detector configured to detect an EMP or IEMI event, the detector comprising;

    an antenna configured to capture signals representing at least a portion of a far field magnetic field generated from an EMP or IEMI event, the EMP or IEMI event having an electric field amplitude between 10 volts/meter and 100,000 volts/meter and a frequency of between 1 MHz to 10 GHz;

    a circuit electrically connected to the antenna, the circuit including;

    an equalizer communicatively connected to the antenna via a direct current isolation circuit, the equalizer outputting signals having an amplitude independent of frequencies of detected signals, the equalizer compensating for differentiating frequency response of the antenna;

    a logarithmic amplifier electrically connected to the equalizer and configured to generate a range of signals based on signals received at the antenna; and

    a peak detector receiving signals from the logarithmic amplifier and configured to capture a peak value of the signals;

    wherein an EMP or IEMI event is detected at least in part based on the peak value.

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