Accession Number : AD0735682

Title :   Ground-Loss Reduction at High Frequencies through the Use of Antenna Arrays.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : De Santis,C. M. ; Schwering,F.

Report Date : DEC 1971

Pagination or Media Count : 58

Abstract : High frequency antenna arrays are shown to reduce the effect of conduction losses normally associated with an antenna operating on or in proximity to the surface of the earth. It is demonstrated that the normal directivity gain as a function of array element spacing is modified by the presence of the finite conducting earth, and that at the lower frequencies in the HF range the gain of the array increases rapidly as the element spacing is increased from zero (single dipole) to about 1/10 of a wavelength. At this spacing, the gain approaches a limit which for low conductivities is close to a theoretical upper bound equal to the number of elements in the array. (Author)

Descriptors :   (*ANTENNA ARRAYS, ATTENUATION), HIGH FREQUENCY, DIPOLE ANTENNAS, NUMERICAL ANALYSIS, GAIN, COMPUTER PROGRAMS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE