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MIL-STD-461 RS103: Radiated Susceptibility, Electric Field

  • Signal Generator – Creates signals and modulations for amplifier.
  • Power Amplifier – Takes signal, amplifies it sometimes greater than 1,000,000 times original power (0dbm going into 1000 W).
  • Low Loss Cables – Interconnect all coax equipment after amplifier.
  • Dual Directional Coupler – Couples off nominal values of forward and reverse power (typically by 40 db or 50 db).
  • Power Sensors – Measures coupled power from dual directional coupler for monitoring (may need attenuator between forward   coupled port and power sensor to avoid damage).
  • Power Meter – Dual channel, displays power sensor reading in dBm or Watts.
  • Tripod – Holds up radiating antenna, non-metallic.
  • Radiating Antenna – Transducer which emits RF power into space from signal source.
  • Electric Field Probe – Measures e-field strength (V/m) on X, Y, Z axes, and composite and returns data via fiber cable.
  • Fiber Optic Communication Link – Non-conductive communication link between field probe and probe interface.
  • Probe Interface – Provides both power to and communication to e-field probe.

 
Frequency Amplifier Antenna DUT Placement Max DUT Dimension/Size at Specified Ant. Dist. (m)
10 kHz – 25 MHz 5000 W 10 kHz – 30 MHz Between Elements ≤ 0.90 x 2.10 x 2.90
10 kHz – 30 MHz 150 W 10 kHz – 30 MHz Between Elements ≤ 0.80 x 0.50 x 0.50
10 kHz – 100 MHz 500 W 10 kHz – 100 MHz Between Elements ≤ 0.36 x 0.46 x 0.36
30 MHz – 220 MHz 5000 W 25 – 1000 MHz Dependent on Shielded Enclosure Parameters
30 MHz – 225 MHz 16000 W 26 – 1000 MHz 1 meter 0.43
220 MHz – 1 GHz 1000 W 80 – 1000 MHz 1 meter 0.53
800 MHz – 4.2 GHz 350 W 800 MHz – 5 GHz 1 meter 0.31
2.5 – 7.5 GHz 300 W 2 – 10.6 GHz 1 meter 0.31
4 GHz – 8 GHz 200 W 4 – 8 GHz 1 meter 0.24
4 GHz – 8 GHz 60 W 4 – 8 GHz 1 meter 0.24
7.5 – 18 GHz 300 W 7.5 – 18 GHz 1 meter 0.5
18 GHz – 26 GHz 40 W 18 – 26.5 GHz 1 meter 0.32
26 GHz – 40 GHz 40 W 26.5 – 40 GHz 1 meter 0.19