Accession Number:

AD0855543

Title:

Aerodynamic Studies of Antenna Breakdown, Part I.

Descriptive Note:

Final rept. 15 Jan 67-14 Jan 69,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE AEROPHYSICS LAB

Report Date:

1969-04-01

Pagination or Media Count:

101.0

Abstract:

Work performed during 1967 and 1968 on the transmission and radiation characteristics of antennas on the surface of a plasma-covered wind tunnel model is reported. The model used is a blunted cone-cylinder operated in a supersonic wind tunnel at M 4, P sub o 1.2 psia and T sub o 100F. The plasma sheath is obtained by injecting nitrogen plasma from a DC arc jet located in the model nose. The effect of the plasma on X-band and S-band antennas located on the model surface was studied and it was found that the breakdown power and transmitted power of an X-band slot were greatly reduced by the plasma layer. The presence of the plasma layer was also found to increase the VSWR of an S-band slot from 1.2 to 20. Some development efforts associated with improvement of the arc jet are also presented. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Radiofrequency Wave Propagation
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE