Communication through Plasma (HyPASS/ReCOMM)

Motivation

• Plasma generated around a vehicle traveling at hypersonic velocities can be a significant impediment to fixed frequency communications.
• EDA is currently pursuing two methods to improve signal communication through a plasma:
  • Real-time antenna matching to the surrounding plasma (HyPASS)
  • Localized plasma density reduction (ReCOMM)
• Critical technology for hypersonic cruise missile program and follow-on systems:
  • This weapon system will depend on GPS navigation for accurate targeting over long ranges
  • Also would dramatically improve the radio blackout issue during re-entry of space vehicles

Approach

• Use combination of plasma diagnostics and antenna matching technology to dynamically match the vehicle antenna to the changing local plasma environment.
• Use the application of electric and magnetic fields to reduce the plasma density over the antenna, effectively punching a hole through the plasma layer.
• Both approaches can be used in combination to achieve a better solution than either technology alone.

Results

• Density Reduction of up to 80% of initial value
• Estimated 5-10 dB signal improvement with antenna matching as well as providing plasma diagnostics – density, collision frequency, and plasma width
• Expected 25 dB or better improvement in signal reception