Accession Number : ADA332891
Title : Dipole and Monopole Antenna Gain and Effective Area for Communication Formulas
Descriptive Note : Technical rept
Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
Personal Author(s) : Logan, J. C. ; Rockway, J. W.
PDF Url : ADA332891
Report Date : SEP 1997
Pagination or Media Count : 19
Abstract : A comparison involving antenna measurements and performance predictions has sometimes revealed a 6-dB discrepancy between the ground wave transmission measurements and the corresponding calculations. The source of this 6-dB discrepancy is attributable to an incorrect definition of the effective area of the receiving vertical monopole antenna. This erroneous definition is that the effective area of the vertical receiving monople is twice as large as that of a corresponding receiving dipole in free space. This report shows that the effective area of a monopole is one-half that of the corresponding dipole. It is this value of effective area that resolves the 6-dB discrepancy between measurements and analysis. This definition has meaning in the general forms of the transmission formula for communicaition and radar systems.
Descriptors : *MONOPOLE ANTENNAS, *DIPOLE ANTENNAS, ELECTROMAGNETIC FIELDS, ANTENNA RADIATION PATTERNS.
Subject Categories : Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE