Accession Number : AD0839107

Title :   HORIZONTAL END-LOADED VLF TRANSMITTING ANTENNA,

Corporate Author : NAVAL WEAPONS CENTER CORONA LABS CA

Personal Author(s) : Seeley, E. W. ; Moision, W. K.

Report Date : JUN 1968

Pagination or Media Count : 46

Abstract : A comparison is made of the theoretical and experimental performances of small, easily constructed, VLF transmitting antenna. It is a horizontal end-loaded multiple-dipole antenna which takes advantage of the earth's conductivity. Radiation efficiency, input impedance, bandwidth, and long range field strength measurements were made; phase and amplitude stabilities of the radiated field were measured during rainstorms; and multiple-frequency resonance tuning was investigated. The radiation efficiency of the experimental dipole is modest but is increased considerably by the addition of parallel dipoles. The bandwidth is a very high (25%), and the power radiation capability is far above that of any other type of VLF transmitting antenna. (Author)

Descriptors :   (*DIPOLE ANTENNAS, VERY LOW FREQUENCY), PHASED ARRAYS, BANDWIDTH, EFFICIENCY, ELECTRICAL IMPEDANCE, COMMUNICATION AND RADIO SYSTEMS, ATMOSPHERIC SOUNDING, IONOSPHERE, RADIOFREQUENCY POWER, PERFORMANCE(ENGINEERING).

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE