Ballistic Missile Tracking and Detection with Plasma Antenna

"Through theoretical analysis and experimental testing ASI is ascertaining the suitability of using gas plasma for a high-powered, reconfigurable antenna operating in both the S and X-bands of the electromagnetic spectrum. This design would be used todetect and track ballistic missile. We believe this design will allow development of multifunctional, multi-spectral plasma array antennas capable of operation in two disparate areas of the spectrum from a single aperture. In addition we are looking atthe suitability of using plasma to replace existing expensive phase shifters in high power array antennas. If this application is successful, it would significantly educe the size, number and cost of phase array antennas. We are evaluating thefeasibility of storing and releasing electromagnetic energy through plasma windows, which would allow rapid reconfigurability and greatly reduced side and back lobes. These design concepts would be applicable to the missions supported by the BMDO."