Communication through Plasma (HyPASS/ReCOMM)

Table of Contents

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

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.

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

Plasma detunes antenna from desired frequency: Measured example of tuning the antenna in plasma environment

Measured reduction in plasma density: Density reduced by 80% in 1 square cm