Accession Number : AD0736516

Title :   Investigation of 'Antenna Dumping' as a Means of Reducing Precipitation Interference in Airborne OMEGA.

Descriptive Note : Final rept.,

Corporate Author : TRACOR INC AUSTIN TX

Personal Author(s) : Baltzer, O. J.

Report Date : JAN 1972

Pagination or Media Count : 20

Abstract : Omnidirectional E-field antennas (e.g., whip, blade, and long-wire antennas) have various practical advantages over crossed-loop antennas in airborne Omega; however, experience has shown that E-field antennas are much more susceptible to precipitation static. The author has proposed that the interference effects of p-static upon E-field antennas might be reduced by periodically discharging ('dumping') any accumulated voltage present on the antenna. The duration of each discharge would be extremely short (typically 0.1 microsecond); on this basis it was hypothesized that the electric field due to propogated electromagnetic signals (Omega) and the electrostatic field associated with p-static would show different recovery characteristics; with the radiative field recovering essentially 'instantaneously'. (Author)

Descriptors :   *RADIO NAVIGATION, *RADIOFREQUENCY INTERFERENCE, *AIRCRAFT ANTENNAS, ELECTROSTATIC PRECIPITATION, OMNIDIRECTIONAL ANTENNAS, ELECTRIC DISCHARGES, REDUCTION, OMEGA NAVIGATION.

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE