Publication:
The effect of blow-down on the effective height of a helicopter supported VLF high-wire antenna

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Authors
Coates, Dannie R.
Subjects
Advisors
Menneken, Carl E.
Date of Issue
1965
Date
1865
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The use of the very-low-frequency segment of the electromagnetic spectrum has been limited by the fact that practical VLF antennas are electrically short. It has been proposed that a helicopter be used to support a vertical radiator at heights of 7000 to 10,000 feet. This would give the antenna dimensions of the same order of magnitude as a quarter-wavelength. In general, the antennas will assume the shape of a centenary curve due to the wind forces acting on the cable. The equations that describe the antenna of general physical shape are presented and an analysis is given of the effects of the curvature on the effective height and radiation resistance of the antenna. Calculated data is presented to show how the antenna shape may be optimized in order to maximize the antenna's effective height.
Type
Thesis
Description
Series/Report No
Department
Department of Electrical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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