Prediction and Verification of Complex Electromagnetic Environment Adaptability for Long-wave Communication Systems

When the long-wave communication system works properly, it must be immersed in the complex strong electromagnetic environment generated by the electromagnetic spectrum signal produced from its own normal work, the strong electromagnetic signal intentionally released from the enemy, and the transient electromagnetic signals such as lightning and electrostatics. The adaptability of the complex electromagnetic environment poses a new challenge to the reliability of long-wave communication system. In this paper, the background electromagnetic environment generated by a type of long-wave communication system and the electromagnetic environmental effect on the external transient electromagnetic pulse are simulated and predicted by FEKO and CST. In addition, the ability to resist strong electromagnetic pulse for the long-wave communication system is verified and the security margin of the system against it is obtained according to the MIL-STD-464C-2010 standard. Besides, the study shows that the near electric field in the background electromagnetic environment of the long-wave communication system is as high as 500V/m to 2000V/m within 100m, the magnetic field within 5 km fluctuates in 70dBuA/m, and the safety margin of it can reach 6.86 dB under the excitation of the external transient electromagnetic pulse environment respectively.