Accession Number : AD0834214

Title :   OPTIMUM ANTENNA ARRANGEMENT FOR A VLF VERTICAL-INCIDENCE IONOSPHERIC SOUNDING SYSTEM,

Corporate Author : NAVAL WEAPONS CENTER CORONA LABS CA

Personal Author(s) : Seeley, Elwin W.

Report Date : MAY 1968

Pagination or Media Count : 23

Abstract : A horizontal dipole near the earth is a useful transmitting antenna for vertical-incidence ionospheric sounding at VLF, but interference from a component of the ground wave presents a problem. Equations are derived to show that an angle of plus or minus 16 degrees off the axis of the transmitting dipole is the optimum position for placement of the receiving antennas to avoid this interfering signal. (Author)

Descriptors :   (*ATMOSPHERIC SOUNDING, VERY LOW FREQUENCY), (*DIPOLE ANTENNAS, ANTENNAS), ELECTRIC FIELDS, ANTENNA ARRAYS, POLARIZATION, CONDUCTIVITY, REFLECTION, MATHEMATICAL ANALYSIS, INTENSITY, MAGNETIC FIELDS, ELECTROMAGNETIC RADIATION, PROPAGATION, IONOSPHERE.

Subject Categories : Atmospheric Physics
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE