very high frequency


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very high frequency

[¦ver·ē ¦hī ′frē·kwən·sē]
(communications)
The band of frequencies from 30 to 300 megahertz in the radio spectrum, corresponding to wavelengths of 1 to 10 meters. Abbreviated VHF.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

very high frequency (VHF)

very high frequency (VHF)click for a larger image
Typical line-of-sight distances for VHF reception.
The range of radio frequencies between 30 and 300 MHz. Portions of this band, 108 to 118 MHz, are used for certain NAVAIDs (navigational aids); 118 to 136 MHz are used for civil air-to-ground voice communications. Other frequencies in this band are used for purposes not related to air traffic control. Very high frequencies are line-of-sight frequencies with practically no ground-wave element. The VHF range increases with height. The maximum ranges for voice communication are about 185 miles (300 km). Communication systems operating VHF bands provide high-quality communications between aircraft and ground stations. In spite of being line-of-sight communication, long-range communications using VHF are possible through repeater stations and satellite links.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

VHF

(Very High Frequency) A range of radio frequencies from 30 MHz to 300 MHz. The VHF band is used for television, FM and amateur radio, airplane navigation and traffic control and marine communications. See UHF and spectrum.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
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