Accession Number:

AD0604013

Title:

PATTERN OF FACTORS OF OPEN-CIRCUITED HORIZONTAL ELECTRIC MONOPOLE ANTENNAS LOCATED ON OR VERY NEAR A FINITELY CONDUCTING MEDIUM,

Descriptive Note:

Corporate Author:

NAVY UNDERWATER SOUND LAB NEW LONDON CONN

Report Date:

1964-03-10

Pagination or Media Count:

184.0

Abstract:

The efficiency of horizontal electric dipole or monopole antennas follows a series of maxima and minima when plotted as a function of length. The first maximum, which is the first order resonance is of the greatest importance, since it corresponds to the maximum attainable efficiency for the figure-eight-type surfacewave pattern of the antenna. Although greater maximum efficiencies are sometimes possible with longer antennas of higher order resonances, the patterns become multilobed, and the over-all antenna efficiency is greatly reduced. It is the purpose of this technical memorandum to clarify the preceding statement by examining the pattern factors of antennas of various electrical lengths, realizing that there are advantages to be gained in certain situations by employing antennas characterized by multilobed patterns. Of the two types of horizontal electric monopole antennas, only the open-circuited conductor completely insulated from the conducting medium will be considered. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE