Engineering topics

Thomas, R. F.

Publications and source records attributed to Thomas, R. F..

2 records

NASA NTRS1998

Ultra-Wideband UHF Microstrip Array for GeoSAR Application

GeoSAR is a program sponsored by DARPA (Defence Advanced Research Projects Agency) and NASA (National Aeronautics and Space Administration) to develop and airborne, radar-based, commercial terrain mapping system for identification of geologic, seismic, and environmental information.

GeoSAR↗

NASA NTRS1979

Dual hybrid mode feed horn

Antenna feed horn is combination of corrugated, round, and tapered waveguide configurations that are dimensioned to excite He sub 11 and He sub 12 modes to illuminate reflector antenna more uniformly than antenna horns excited only in He sub 11 mode. Horn is adaptable to both symmetrical and asymmetrical Cassagrainian antennas.

Bathker, D. A.↗