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