RADIO INTERFERENCE FROM CORONA DISCHARGES
Abstract
Corona-discharge studies are described that were devoted specifically to the mechanisms by which electromagnetic disturbances are produced that cause interference with radio reception. The mean by which these disturbances are coupled into a receiver are treated as well as the nature of the dependence of this coupling upon the geometrical configuration of the body on which the discharge occurs. A fundamental coupling theorem of considerable generality is developed which is based directly on Maxwell's field equations. The theorem can be applied in studying the noise signals coupled into the receiver from a discharge occurring at some remote corner of an aircraft; in addition, it is applicable to the converse situation: the dipole moment of the discharge can be inferred from the current pulse measured at the base of a discharge point and from certain supplemental electric-field investigations for the discharge electrode system. The experimental investigation of the transient nature of negative point corona pulses was carried out with the aid of a newly developed oscilloscope which is capable of defining pulses having rise times of 7 microsec. The coupling theory was applied in determining from the oscillographic data the effective depole moments of the discharge. The over-all results were applied to various configurations (the fixed-wire, the prolate-spheroidal, and the cylindrical dipole antennas). considerations on devices currently in use for the suppression of precipitation static are also discussed in the light of the theory developed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1953
- Accession Number
- AD0012600
Entities
People
- R. L. Tanner
Organizations
- Stanford University