High Temperature Electromagnetic Characterization of Thermal Protection System Tile Materials

By National Aeronautics and Space Administration

This study investigated the impact of elevated temperatures on the electromagnetic performance of the LI-2200 thermal protection system. A 15-kilowatt CO2 laser was used to heat an LI-2200 specimen to 3000 F while electromagnetic measurements were performed over the frequency range of l9 to 21 GHz. The electromagnetic measurement system consisted of two Dual-Lens Spot-Focusing (DLSF) antennas, a sample support structure, and an HP-8510B vector network analyzer. Calibration of the electromagnetic system was accomplished with a Transmission-Reflection-Line (TRL) procedure and was verified with measurements on a two-layer specimen of known properties. The results of testing indicated that the LI-2200 system's electromagnetic performance is slightly temperature dependent at temperatures up to 3000 F. Heil, Garrett G. ELECTROMAGNETIC MEASUREMENT; HIGH TEMPERATURE; LASER HEATING; REENTRY VEHICLES; REUSABLE HEAT SHIELDING; SPACECRAFT SHIELDING; TEMPERATURE DEPENDENCE; THERMAL PROTECTION; TILES; AEROASSIST; CARBON DIOXIDE LASERS...

• Format: Paperback
• Language: English
• ISBN: 1731318677
• ISBN13: 9781731318671
• Release Date: January 1
• Publisher: Independently Published
• Length: 150 Pages
• Weight: 0.80 lbs.
• Dimensions: 0.3" x 8.5" x 11.0"