EFFECTS OF RE-ENTRY PLASMA SHEATH ON ANTENNA CHARACTERISTICS
Abstract
This report deals with various effects of the plasma which forms around a re-entry vehicle on antenna characteristics. A general formulation is developed for spherically inhomogeneous plasmas. It is shown that only the radial functions are affected by the inhomogeneity, so that results for the uniform plasma case can be extended to the non-uniform case by the substitution of the appropriate radial functions. The effect of noise generated by the plasma on the problem of signal reception aboard a hypersonic re-entry vehicle is discussed. The effective noise temperature of the plasma depends on the attenuation of the plasma. Thus, the optimum frequency for reception usually will be significantly lower than for transmission. An optimization procedure is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1960
- Accession Number
- AD0438964
Entities
People
- B. Y.-c. Koo
- J. W. Marini
- M. Katzin